Using the latest iOS app on iPad V10.4.5360 / OS26.4.1, I can add the Yahoo.com account ok via the wizard and it pops up and allows eM Client access to the Yahoo account ok and adds in fine.
However after around 30sec you then start to get CalDAV synchronising errors in Show Operations. If you press ignore the error it’s the comes back very shortly. This happens on two different iPads with different Yahoo accounts with the latest version.
Removing the Yahoo online OAuth tokens and removing and readding the accounts doesn’t fix it like it used to fix it with the older eM Client iOS iPad app when that happened previously.
Now using our iPhones with the same EM Client iOS mobile app ver and OS26.4.1 we can add our same Yahoo.com accounts via the automatic wizard and they add in exactly the same “and don’t have any CalDAV synchronising errors at all” using the same Wifi or Cell data connection.
So wondering if anything is different about the new iPad iOS app build or changed compared to the previous iPad app that might be causing this issue, being this happens on 2 different M1 iPads with different Yahoo.com accounts.