I don't know if am missing something but I think something went wrong with
the merge of QA_4_7 into master. I after running and update I am unable to
access PMA with the internal server error.
[Sun Apr 02 21:47:42.550848 2017] [:error] [pid 6452] [client
127.0.0.1:56586] PHP Fatal error: Interface
'Psr\\Container\\ContainerInterface' not found in
/var/www/html/phpmyadmin/libraries/di/Container.php on line 17
I hope am not missing anything.
I opened an issue on github for it