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Had been running 13.x and tried to install PHP 7.3, 13.x balked. So I decided to try 14.04 beta, no help.
I backed out PHP 7.3 and re-installed 7.2, Nextcloud told me browser not supported using Firefox. I
tried chrome, it gives me an HTTP ERROR 500. Tried Lynx, it gets stuck in a weird login loop. There does not
appear to be any supported way to downgrade and 14.04 is clearly ultra-broken.

Nextcloud version (eg, 14.04 beta):
Operating system and version (eg, Ubuntu 18.04):
Apache or nginx version (eg, Apache 2.4.34):
PHP version (eg, 7.1):

The issue you are facing:

See Details.

Is this the first time you’ve seen this error? (Y/N):Y

Steps to replicate it:

  1. Install 14.04 beta on the above platform
  2. Try to access with Firefox
  3. Try to access with Chrome.

The output of your Nextcloud log in Admin > Logging:


The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):


The output of your Apache/nginx/system log in /var/log/____:


It is not really clear what you did and what is not working (logfiles). Did it work on a previous stable version (NC 12 or NC13)? Please note for a beta version, please do backups before or use an entire test setup, such versions are not stable and you should expect to manually play back your backup.