Hi I am getting this
It looks like we could not accept your application to join Upwork. To learn more, look for the email we sent you about your application. This email includes information about why we could not accept your profile and offers tips for reapplying if you’re eligible.
Why is this
But I am able to apply to clients
I tried replicating your concern and was unable to see the error. Can you try using a different browser, clear your cache and cookies then check if you're still getting the message? If yes, please send me a screenshot via private message by clicking on my name. I'll be waiting for your update.