Some time back after an upgrade I lost all styling, graphs etc. At the time I resolved this by disabling the combining of css and javascript files as described in Troubleshooting - Analytics Platform - Matomo
Today I have uploaded the beta of Piwik 2 and the problem has returned. I have checked the config.ini.php file and it still shows the line previously added to stop file combining.
Has anything changed in Piwik 2 that may be causing this?
Piwik 2.0 now uses Less for compiling CSS (which helps write smaller and more maintanable CSS) and so the CSS file now requires the merging unfortunately.
I guess the problem is the css file cannot generate because of timeout error, or other.
When you enable the CSS Merging, do you get an error in your error log?