I don’t know if Themeco reset the permissions for Cornerstone, but after updating it, authors no longer had access to Cornerstone (the ‘Cornerstone’ tab wouldn’t appear in the edit page/post).
I went into X Theme’s settings and enabled pages and posts for authors.
After doing that, authors can now see the ‘Cornerstone’ tab. However, when they click the tab and click ‘edit with Cornerstone’, the edit page/post simply refreshes while set to the ‘Text’ tab.
I read a previous thread: https://theme.co/apex/forum/t/cornersone-not-working/32867
Following the steps indicated there, I deactivated and deleted Cornerstone then went to X > Validations to reinstall it.
This did not resolve the issue.
This issue is apparent when logged in as an Author but not as an Administrator, which makes me think it might be a permissions issue.
Please help me resolve this issue. Thank you.