I use the mail app to receive my yahoo mail. For the last several months I have been getting the pop up to log in to the yahoo account. Over the last few days it has popped up repeatedly, several dozen times each day. I tried changing my password without success. I have tried purging caches, trashing preferences and repairing permissions. None of which seems to help. I do not get the pop up if I use the yahoo account directly, only when using mail. Below are listed my devices and versions.
If anyone has had a similar experience and has been able to correct the problem please let me know as it is becoming very frustrating. Thanks.