i’ve got issues with some cal resources.
As you can see, only some of the i.cal.to resource have problems. It is hard to debug, as ICSDroid does not have a debug option to enable. I also pasted the content of the ics URLs into an ICS Validator on this site https://icalendar.org/validator.html
The validator says everything is valid and fine. What can i do, to help debug this problem.