Troubleshoot Xibo 1.7.8 installation after upgrade system

I had a working installation of Xibo 1.7.8. I upgraded the server from CentOS 6 to CentOS 7, upgraded the MySQL DB to version 5.7.20. I upgraded the tables. Everything went fine. When I visit my Xibo login page, I just get a blank page! Nothing else! I don’t get any error messages in the log files. I uncompressed a brand new 1.7.9, copied over my settings.php and tried to start with that – same thing. I cannot for the LIFE of me figure out what’s going on. However, since I can’t get INTO Xibo, I can’t capture logs from it. What would be the way to debug this installation???
In mysql log, I only see:
2017-12-03T02:48:33.301526Z 3 Connect xibo@localhost on xibo using TCP/IP
2017-12-03T02:48:33.301755Z 3 Query SET NAMES 'utf8’
2017-12-03T02:48:33.302806Z 3 Quit
There are no errors in the web server logs.
I can login as Xibo to mysql using the credentials.



Did PHP also get upgraded at the same time? PHP 7 isn’t supported any any released version of Xibo at the time of writing.

You can see if Xibo is logging anything by looking in the log table in the database.