Hi and welcome 🙂
I was able to successfully load the list of events (there were over 800, so that might be a factor) and import an event with no problems. (see screenshot below)
Can you please confirm you’ve reviewed our Testing for conflicts guide to rule out a theme/plugin conflict? Let me know and we’ll go from there. Our ‘New User Primer: iCal Importer’ is also a great resource for troubleshooting and identifying conflicts.
Other than that, I’m really not sure as to why the iCal Importer plugin isn’t working for you. If it comes down to it, we have a list of customizers that can get the job done.
Keep me updated and have a great rest of your day.
Cheers!