It seems there is problem with token

[nenadalm]

should't be in SymfonyMailerContext something like: $token = end($token) ? (that's happen if $token is null in parameter)

substr() expects parameter 1 to be string, array given in /srv/www/nextlove/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php on line 185