While accessing the Yahoo mail account, you may face some issues, and a message stating Temporary error 15 may appear. If this error appears, you cannot access your email account further.To solve the Yahoo Mail Temporary error 15, follow the following troubleshooting steps one-by-one.
Refresh or reload the web page on your browser to check whether the temporary error 15 has been cleared. Sometimes, the Yahoo mail temporary error 15 clears by itself.
The browser cache may also be one of the reasons for the Yahoo mail's temporary error 15. So clearing the cache and cookies would clear the temporary error.
Clear cache & cookies in Chrome web browser:
Clear cache & cookies in Firefox web browser:
After clearing the browser data, make sure to restart your web browser. If possible, restart your computer. Then launch the browser and log in to the Yahoo mail account and check if the yahoo mai temproray error 15 is resolved.