Crash trying to open calendar entry from ICS (WebEx)

I have imported a WebEx calendar ICS file to my eM Client LOCAL calendar, which works perfectly. I can see it on my calendar. If I double-click it or right-click, select Open - eM Client crashes.

Manually entered calendar entries work fine and so do other imported ICS entries.  I can delete the entry also.

eM Client is 7.2.34711.0 on Windows 10.  The exception shows System.Reflection.TargetInvocationException

Does anyone have any ideas on how to overcome this issue?  Thanks in advance for any help!

I found part of the issue - it is because of something in a “X-ALT-DESC;FMTTYPE=text/html:” tag in the ICS.  I saw a “SGML” parsing exception in the error report so looked at the ICS details. I removed that X-ALT-DESC line and eM Client is fine with it.

Would anyone that works on eM Client want this ICS file to look into the problem more?