After upgrading to the latest IPB 4.x, I'm getting this error:
Wed, 06 Jan 2016 13:18:41 +0000 (Severity: 4)
46.246.xxx.xxx - http://example.com/
Template store key: template_1_2b3106f5121a5ec568245e6eecbe3f60_widgets rebuilding and requested again (portal, front, widgets)
------------------------------------------------------------------------
Forum returns HTTP 500, administration works fine... If I disable the App, forum returns back to normal.
Any ideas?