Update to 3.0 fails

Update to Piwik 3.0 fails with the error message:

An exception has been thrown during the rendering of a template (“variable @theme-color-widget-exported-background-base is undefined: failed at background-color: @theme-color-widget-exported-background-base; line: 1869”) in “@CoreUpdater/runUpdaterAndExit_welcome.twig” at line 8.

Pls help.

Regards Uwe

I have same issue when updated Piwik 3.0 :-/

Can you use Piwik at all, or do you get this error all the time / on all pages?

Same issue here. I get this error all the time.