Unable to search my Yahoo contacts or access using "to", etc

Finally found a solution after trying all these others.  I switched out of Yahoo Mail Plus into the old free Yahoo mail.  Everything there worked fine.  Then I switched back to Plus and all my problems seemed to be resolved!!!  Yay!

Good day!

There are a few things you may attempt if you're unable to search or access your Yahoo contacts when writing an email:

Your browser's cache should be cleared sometimes since collected data might interfere with a website's operation. Your browser's cache can be cleared to help reload the page and resolve any momentary issues.

Verify your internet connection. Make sure your internet connection is reliable. Your connection's strength or consistency might have an impact on how well Yahoo Mail works.

Switch to a different browser or device to see if it helps you figure out whether the problem is unique to your present set up. If it functions flawlessly on another browser or device, a compatibility issue could be the cause.
 

Disable browser add-ons: Some add-ons or extensions for browsers can prevent websites from operating as intended. Disable any installed extensions for the time being to see if it fixes the issue.

Yahoo customer support number It is preferable to contact Yahoo support directly if the aforementioned measures don't solve the problem. They are qualified to look into and offer detailed fixes for problems with your Yahoo contacts.

I sincerely hope one of these ideas aids in your problem-solving and enables you to recover access to your Yahoo connections. Good fortune!