Quote:

I upgraded XOOPS from 2.0.18 to 2.5.6. Make appearance many different errors. Basically error modules. After 2 days of "dancing with a tambourine" (I did not keep a journal of their manipulation - it's bad) modules began to work. But authorization has become impossible (user.php returns a blank page). No debug errors, no server errors in logs ... Your advice is not helping.

Then I checked the version PHP - 5.2.14. You said - need 5.3.7 version or high. I upgrade PHP to 5.4.24. Reveal itself are new errors (I again did not keep the journal). All without result.

Then the thought came reloaded XOOPS 2.5.6 Full package. And "voilà"! Its working.

P.S. Sorry for my English.

I fixed this problem, just reload the installation files from Full package.

Thanks for attention.

Thanks Mamba, but I did it a few times. I also turned off all modules (include Profile module) and update them. I also turned off protector. I watched logfiles. Nothing ... Only "GET /user.php HTTP/1.1" 302 20 "-".

Аuthorization does not occur. If I knew the authorization mechanism ...

Perhaps there was an error when upgrading XOOPS or PHP.

I have exactly this problem too.
I have PHP 5.4.24 and now upgrade to XOOPS 2.5.6.
Some body help?

In my event of the notifications sended from some modules. Other modules of the notifications do not send.