Невозможно запустить обновление composer.phar на сервере

Я пытаюсь запустить приложение Symfony на рабочем сервере. Я загрузил свои веб-файлы в public_html папка. Я установил Composer в свой ресурс проекта, используя composer.phar install, Сейчас я пытаюсь обновить Composer на сервере, я получаю это сообщение / ошибка

обновление php composer.phar
Загрузка репозиториев композитора с информацией о пакете
Обновление зависимостей (включая require-dev)
Ваши требования не могут быть разрешены для устанавливаемого набора пакетов.

Problem 1
- Conclusion: remove symfony/symfony v2.5.12
- Conclusion: don't install symfony/symfony v2.5.12
- Conclusion: don't install symfony/symfony v2.5.11
- Conclusion: don't install symfony/symfony v2.5.10
- Conclusion: don't install symfony/symfony v2.5.9
- Conclusion: don't install symfony/symfony v2.5.8
- Conclusion: don't install symfony/symfony v2.5.7
- Conclusion: don't install symfony/symfony v2.5.6
- Conclusion: don't install symfony/symfony v2.5.5
- Conclusion: don't install symfony/symfony v2.5.4
- Conclusion: don't install symfony/symfony v2.5.3
- Conclusion: don't install symfony/symfony v2.5.2
- Conclusion: don't install symfony/symfony v2.5.1
- friendsofsymfony/rest-bundle 2.1.0 requires symfony/finder ^2.7|^3.0 -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.17, v2.7.18, v2.7.19, v2.7.2, v2.7.20, v2.7.21, v2.7.22, v2.7.23, v2.7.24, v2.7.3, v2.7.4, v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9, v2.8.0, v2.8.1, v2.8.10, v2.8.11, v2.8.12, v2.8.13, v2.8.14, v2.8.15, v2.8.16, v2.8.17, v2.8.2, v2.8.3, v2.8.4, v2.8.5, v2.8.6, v2.8.7, v2.8.8, v2.8.9, v3.0.0, v3.0.1, v3.0.2, v3.0.3, v3.0.4, v3.0.5, v3.0.6, v3.0.7, v3.0.8, v3.0.9, v3.1.0, v3.1.1, v3.1.10, v3.1.2, v3.1.3, v3.1.4, v3.1.5, v3.1.6, v3.1.7, v3.1.8, v3.1.9, v3.2.0, v3.2.1, v3.2.2, v3.2.3, v3.2.4].
- friendsofsymfony/rest-bundle 2.1.1 requires symfony/debug ^2.7|^3.0 -> satisfiable by symfony/debug[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.17, v2.7.18, v2.7.19, v2.7.2, v2.7.20, v2.7.21, v2.7.22, v2.7.23, v2.7.24, v2.7.3, v2.7.4, v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9, v2.8.0, v2.8.1, v2.8.10, v2.8.11, v2.8.12, v2.8.13, v2.8.14, v2.8.15, v2.8.16, v2.8.17, v2.8.2, v2.8.3, v2.8.4, v2.8.5, v2.8.6, v2.8.7, v2.8.8, v2.8.9, v3.0.0, v3.0.1, v3.0.2, v3.0.3, v3.0.4, v3.0.5, v3.0.6, v3.0.7, v3.0.8, v3.0.9, v3.1.0, v3.1.1, v3.1.10, v3.1.2, v3.1.3, v3.1.4, v3.1.5, v3.1.6, v3.1.7, v3.1.8, v3.1.9, v3.2.0, v3.2.1, v3.2.2, v3.2.3, v3.2.4].
- symfony/debug v2.7.10 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.11 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.12 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.13 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.14 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.15 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.16 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.17 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.18 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.19 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.2 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.20 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.21 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.22 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.23 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.24 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.3 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.4 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.5 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.6 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.7 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.8 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.9 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.0 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.1 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.10 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.11 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.12 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.13 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.14 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.15 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.16 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.17 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.2 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.3 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.4 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.5 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.6 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.7 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.8 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.8.9 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.0 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.1 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.2 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.3 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.4 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.5 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.6 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.7 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.8 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.0.9 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.0 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.1 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.10 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.2 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.3 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.4 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.5 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.6 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.7 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.8 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.1.9 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.2.0 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.2.1 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.2.2 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.2.3 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v3.2.4 conflicts with symfony/symfony[v2.5.0].
- don't install symfony/finder v2.7.0|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.1|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.10|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.11|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.12|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.13|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.14|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.15|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.16|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.17|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.18|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.19|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.2|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.20|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.21|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.22|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.23|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.24|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.3|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.4|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.5|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.6|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.7|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.8|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.7.9|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.0|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.1|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.10|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.11|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.12|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.13|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.14|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.15|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.16|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.17|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.2|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.3|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.4|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.5|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.6|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.7|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.8|don't install symfony/symfony v2.5.0
- don't install symfony/finder v2.8.9|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.0|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.1|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.2|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.3|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.4|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.5|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.6|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.7|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.8|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.0.9|don't install symfony/symfony v2.5.0
- symfony/debug v2.7.0 conflicts with symfony/symfony[v2.5.0].
- symfony/debug v2.7.1 conflicts with symfony/symfony[v2.5.0].
- don't install symfony/finder v3.1.0|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.1|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.10|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.2|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.3|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.4|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.5|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.6|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.7|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.8|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.1.9|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.2.0|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.2.1|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.2.2|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.2.3|don't install symfony/symfony v2.5.0
- don't install symfony/finder v3.2.4|don't install symfony/symfony v2.5.0
- Installation request for symfony/symfony 2.5.* -> satisfiable by symfony/symfony[v2.5.0, v2.5.1, v2.5.10, v2.5.11, v2.5.12, v2.5.2, v2.5.3, v2.5.4, v2.5.5, v2.5.6, v2.5.7, v2.5.8, v2.5.9].
- Installation request for friendsofsymfony/rest-bundle ^2.1 -> satisfiable by friendsofsymfony/rest-bundle[2.1.0, 2.1.1].

пожалуйста, что может быть не так и как можно решить эту проблему, так как это странно для меня. Любезно помочь