Hello @LeonidS

I removed the keys from One Signal and the same thing continues to happen.

I thought it was something else, because the UNA page shows the same red messages about One Signal (console) as mine, but you don't have the same problem.

The same thing happens on the Groups page, although in this case the list of group members is not fully displayed.

After approx. 10 minutes I was able to view the list of members. To the right the errors.