@sdetweil I tried both the above suggestions, but no change.
However, I enabled the DEBUG mode and saw that some events in my calendar took a lot longer to be processed. These events are open-ended events in my Google calendar. They look like the below extract. So I removed them temporarily.
I no longer get the Warning: vkCreateInstance: Found no drivers!
The calendar now loads.
But I’ll try to re-create them and see if they are formatted the same way.
[06.01.2024 17:35.14.090] [DEBUG] Event:
{"type":"VEVENT","params":[],"start":"2021-01-19T13:00:00.000Z","datetype":"date-time","end":"2021-01-19T14:00:00.000Z","rrule":{"_cache":{"all":false,"before":[],"after":[],"between":[]},"origOptions":{"tzid":"Europe/Paris","dtstart":"2021-01-19T13:00:00.000Z","freq":0,"wkst":{"weekday":1}},"options":{"freq":0,"dtstart":"2021-01-19T13:00:00.000Z","interval":1,"wkst":1,"count":null,"until":null,"tzid":"Europe/Paris","bysetpos":null,"bymonth":[1],"bymonthday":[19],"bynmonthday":[],"byyearday":null,"byweekno":null,"byweekday":null,"bynweekday":null,"byhour":[13],"byminute":[0],"bysecond":[0],"byeaster":null}},"dtstamp":"2024-01-06T16:34:29.000Z","uid":"clhj8p9p6gqmab9ncoq3ab9k68p3ab9pcgq6cb9kcgr3acpn70o62dpkcg@google.com","created":"2021-01-19T15:21:58.000Z","lastmodified":"2021-01-19T15:22:30.000Z","sequence":"1","status":"CONFIRMED","summary":"Event xyz","transparency":"OPAQUE","method":"PUBLISH"}
[06.01.2024 17:35.14.091] [DEBUG] start: Tue Jan 19 2021 14:00:00 GMT+0100 (Central European Standard Time)
[06.01.2024 17:35.14.091] [DEBUG] end:: Tue Jan 19 2021 15:00:00 GMT+0100 (Central European Standard Time)
[06.01.2024 17:35.14.091] [DEBUG] duration: 3600000
[06.01.2024 17:35.14.092] [DEBUG] title: Event xyz
[06.01.2024 17:35.14.092] [DEBUG] Search for recurring events between: Sat Jan 06 2024 17:35:14 GMT+0100 (Central European Standard Time) and Sat Jan 04 2025 23:59:59 GMT+0100 (Central European Standard Time)
[06.01.2024 17:35.40.211] [DEBUG] Title: Event xyz, with dates: [null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
... I removed about 8000 "nulls" here...
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null]
[06.01.2024 17:35.40.243] [DEBUG] event.recurrences: undefined
[06.01.2024 17:35.40.243] [DEBUG] Processing entry...