Thread:Project:Support desk/v1.20.2 installation problem - cannot log in

Installed version 1.20.2 but cannot log in to the wiki. I go to Main_Page, click on "Log in" on top right, type the correct username/password, and... it gives me back Main_Page with the "Log in" link still on top right. The credentials are correct because with the wrong password instead, I get "Login error Incorrect password entered. Please try again."

My user does get listed on the ListUsers special page, as "bureaucrat,administrator" (neither of these words link to existing pages though). ListGroupRights shows groups "all", "Autoconfirmed users", "Bots", "Bureaucrats", "Administrators", and "Users" - these should be standard.

Anybody has some tips on how to troubleshoot this problem? With debugging on, the following diagnostic messages look odd (but could very well be harmless):

* Profiler::instance called without $wgProfiler['class'] set, falling back to ProfilerStub for safety * Class PEAR_Error not found; skipped loading