Error_log: PHP Warning, PHP Fatal error in TranslationsExtension.php

[ljubica]

I've alredy had this problem and I could not solve it... it's happening again and I do not know what to do... Hope someone will be able to help me or at least point me who to turn to.
 
Everything worked fine until I started to translate. I translated using the "Modify translations" section.
Then error_log appeared in Admin directory. 

[12-Mar-2017 14:05:03 Europe/Belgrade] PHP Warning:  Invalid argument supplied for foreach() in /home/xxxxx/public_html/src/PrestaShopBundle/Twig/TranslationsExtension.php on line 115
[12-Mar-2017 14:05:03 Europe/Belgrade] PHP Warning:  reset() expects parameter 1 to be array, null given in /home/xxxxx/public_html/src/PrestaShopBundle/Twig/TranslationsExtension.php on line 143
[12-Mar-2017 14:08:20 Europe/Belgrade] PHP Fatal error:  Uncaught exception 'RuntimeException' with message 'Failed to write cache file "/home/xxxxx/public_html/app/cache/prod/classes.php".' in /home/xxxxx/public_html/vendor/symfony/symfony/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php:278
Stack trace:
#0 /home/xxxxx/public_html/vendor/symfony/symfony/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php(152): Symfony\Component\ClassLoader\ClassCollectionLoader::writeCacheFile('/home/xxxxx/...', '<?php \nnamespac...')
#1 /home/xxxxx/public_html/app/bootstrap.php.cache(2665): Symfony\Component\ClassLoader\ClassCollectionLoader::load(Array, '/home/xxxxx/...', 'classes', false, false, '.php')
#2 /home/xxxxx/public_html/app/bootstrap.php.cache(2500): Symfony\Component\HttpKernel\Kernel->doLoadClassCache('classes', '.php')
#3 /home/xxxxx/public_html/app/bootstrap.php.cache(2534): Symfony\Component\HttpKernel\Kernel->boot()
#4 /home/xxxxx/public_html/admin/index.php(86): Symfony\Component\HttpKernel\Kernel->handle(Object( in /home/xxxxx/public_html/vendor/symfony/symfony/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php on line 278
[12-Mar-2017 17:31:55 Europe/Belgrade] PHP Warning:  array_key_exists() expects parameter 2 to be array, string given in /home/xxxxx/public_html/src/PrestaShopBundle/Twig/TranslationsExtension.php on line 305

1.line-218.line - are same
225.-481. line - are same
 
 
Last time I did not notice error_log until there was an increasing problem. After that I was no longer able to log in as admin. I wrote about this issue here:
https://www.prestashop.com/forums/topic/596811-error-log-php-fatal-error-translation-not-found/?do=findComment&comment=2516323
 
I have to translate the site, but this is impossible in this way.
 
 
Thanks in advance

Edited March 12, 2017 by ljubica (see edit history)