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The problem
When trying to access the "compare revisions" view in a project with
DEBUG=False
andwhitenoise
set up, the view gives a 500 error with the following message:The cause
This issue is caused by the 'wagtailadmin/css/layouts/compare-revisions.css' stylesheet being moved out of the
admin
app and into acore.css
stylesheet on the4.0.X
branch. See:The solution
Since
core.scss
is already loaded by default on the admin panel, the 'compare-revisions.css' stylesheet will also be loaded by default on 4+ versions of Wagtail. Hence, we can simply remove the imports for those stylesheets.