Welcome to Microsoft Q&A!
Please close all running Visual Studio IDE and delete the cookies in your browser to retry the connection.
If it doesn’t work, I am afraid, you can consider migrating your project to a later version as VS2010 has ended for support.
Thanks for your understanding!
Sincerely,
Anna
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.