If you're having trouble with Yahoo Mail not working, there are several troubleshooting tips and tricks you can try. You can also try disabling browser extensions or add-ons that may be causing conflicts with Yahoo Mail. Another common solution is to disable your antivirus software temporarily. If none of these solutions work, try contacting Yahoo Mail support or resetting your Yahoo Mail password.
https://comfix365.com/blog/yahoo-mail-not-working/