How to view an event that is causing a conflict in Apple Calendar?

This issue continues to arise. I am using Zoho mail for my server, and setup IMAP on my iPhone and MacBook Pro.

My MacBook Pro suddenly doesn't refresh calendar entries, or if I try to modify a calendar item on my MacBook it shows as updated, but it never sends out updates to invitees or updates any other calendar besides the local calendar. I also have iCloud sync enabled.

I then sometimes notice a Notice Triangle in the corner, and when clicking it, I see the following:

This is a useless message as I have no idea what event it is referring to. When I click ok it seems like it goes to a date but it is unclear to me which item is the problem.

How do I find more details, either in a log, or clear this error out to continue with IMAP syncing ?

I have not seen any specific posts on how to fix this particular issue.

Thanks in advance, this has been frustrating me for almost a year now and to the point where I am ready to drop apple calendar across my devices for Outlook.