...
If you add the link in the Location field, it will not be clickable in the iCalender (ICS) file. If it is essential to make the link clickable, you can copy it to the event description (where this link will become clickable).
If you’ve configured the reminder notification to be sent to attendees 1 week, 3 days, 1 day, 1 hour, and 10 minutes prior to the event in the When should users be notified before the event? section, and you’ve added a link in the Location field of the occurrence, attendees can click the link in the reminder email that is sent to them:
If the link is too long, you can use a URL shortener, such as Short URL or others that may be available.
If you create an occurrence and save it, but then come back later and add a link or change the existing link, this change won’t be reflected in the iCalendar (ICS) file right away, so it is recommended that you put the correct link and details into the event occurrences before saving the final event and making it available.