Since the present behavior for the issue is different, the updated description is provided below.
The previous description of the issue is moved to Comments.
Two cases - 1) a topic was deleted when another user attempt to post/add new topic 2) The Flow board (a page was deleted).
The topic was deleted.
- First user deletes a topic while another user was viewing the topic (the topic is displayed on the second user screen).
- The second user attempts to add a new topic or a new post. For a new topic the error message displays confusing 'vppermissions'; for adding a post the error message is ok.
Note: there are no other, previously reported issues - i.e. 'dimmed' drop-down menu, odd 'discard exchanges' VE pop-up, or 'Conversion from 'topic-title-wikitext' to 'html' was requested...'.
A Flow board was deleted.
- the second user attempting to add a new topic or a post, will see "Page provided does not have Flow enabled and safeAllowCreation failed with: User does not have the "Create Flow boards in any location" permission" - which is misleading