Revo 2.1: Blank page after login

While working on my site with site manager I suddenly got a blank page after refreshing some page.
Now it appears every time I’m logged in! There are no error messages. Even HTML-header is not rendered. There are also no related errors in core/cache/logs/
This problem appears in FF and IE. Seems to be session related? I have no idea... Website frontend works without any problems, manager login form gets rendered too. So this issue occurs only with backend interface.

Serverinfo:
OS Linux (Godaddy hosting account)
MySQL client 5.0.77 server 4.1.24
PHP 5

Could you check your php memory limit? The last godaddy site I worked on they had a very low memory limit. It could also be the database connection timing out.

memory_limit is set to 64M. I tried to change this value in my .htacces and php.ini but it didn’t had any effect.
How can I check if there is some database issue?
Thanks!

I’ve been getting this same issue. I’m having to consistently keep clearing my browser cache and cookies to solve this problem. No idea whats causing it.

I had the same behavior. It was caused by unsuccessful RSS feeding of MODX and security news. I was behind a proxy and the RSS feeding attempts were so long (and unsuccessful) that the first manager page after login expired and returned a blank page.

The solution (workaround) was to access the database directly, and switch off the RSS feeding from the system settings.