[Solved] Another Bug
I created a standard user with posting privileges. I next created a post with a link inserted. The link is causing a bug to appear. Please see video: https://cl.ly/afbba0521067
If you use wpForo Embeds addon please navigate to Dashboard > Forums > Settings > Addons > Embeds Tab and Disable Content Embedding option. Then delete all caches in Dashboard > Forums > Dashboard admin page and check it again.