Shared iCloud Reminders issue

[mk313]

I share several reminders lists with my wife (grocery, etc). They are all lists that I created and share with her. Everything has been working fine, until Yesterday. I am using Mac OS version 10.15.5 for my Mac & 13.6 on my phones & iPad.

I upgraded both phones over the weekend (both new phones are also running iOS 13.6

But now I am getting a message on all of the shared reminder lists (on my Mac, iPad & one iPhone) that 'The creator of this list has upgraded these reminders' If I click on the link, it says that I need to upgrade to iOS 13 in order to see them, but I am running that on all of my iOS devices already. Interestingly enough, the other phone (iPhone 8) doesn't have any issue displaying the shared reminder lists.

Any ideas what I may be doing wrong?
Thanks in advance,

 

[Apple_Robert]

Try signing out and back in with iCloud on your affected devices.

 

[mk313]

Thanks! I had tried restarting the machines but that didn't fix it. Logging out of iCloud and then back in did the trick.