I'm finding that on our 5.0.7 site after applying PloneHotfix20210518-1.1, anyone trying to look at @@historyview is getting "Insufficient Privileges".
In event.log I'm seeing
2021-05-18T15:14:50 WARNING plone.protect error parsing dom, failure to add csrf token to response for url https://[...]/portals/[...]@@historyview
Has anyone else seen something similar? Thanks!