While attempting to upgrade from 8.2 update 5 to 9.0 update 2 I came across this error after disabling the WFFM module. The upgrade guide instructs us to disable a group of files in preparation of installing the upgrade package:
After making this change, the following error came up:
Server Error in ‘/’ Application.
Could not find configuration node: wffmRenderingContext
The fix was to remove the Sitecore.Forms.MVC.dll. Once that was done, everything was working again as expected. I hope someone finds this tidbit useful.
15+ year programming professional with 10+ years devoted to Sitecore development. I've been using the platform since Sitecore 6.0 and currently serve as a Technical Architect at Verndale.