Not sure if it’s a bug or just me but I’m having this notification preventing me from logging in on a daily basis now, sometimes when trying to demo the product to clients. Normally sorts itself if I wait 15min but a bit embarrassing none the less.
I normally see this when i have been messing around in the workflows/sessions and set something not quite right following a change. Have you tried to clear all the cookies relating to the app to make sure the session information is fresh.
Does it happen on the same thing?
If it is happening regularly you can share the app with the @Bubble team to investigate via a bug report form, which you can share privately rather than share it publicly on the forums.
I have a workaround, schedule a delayed event 2 seconds later in case the user is still not logged in and try again with the same scheduled event in case they are still not logged in. See the demo below.