I have an .ics calendar file which I cannot import into my Samsung Calendar.
If I click on it, it opens and I can see all entries. I can then click "Save all to calendar", and it says "Importing...". But after a few seconds, I get a popup saying
Calendar has stopped
Open app again
The same .ics file imports fine into Thunderbird on a PC, and a friend could import it from an email into his iPhone.
My phone is a Samsung Galaxy A6 with Android 8.0.0. The Calendar app is version 4.4.09.1.