"Couldn't communicate with a helper application" in Xcode

When attempting to sign into my team's developer Apple ID (Xcode>Preferences>Accounts>Plus Icon>Apple ID) I see a message that reads the following:

"Couldn't communicate with a helper application. Try your operation again. If that fails, quit and relaunch the application and try again."

I've restarted Xcode and my computer to no avail. What should I do?

same problem here, please help me when you get answer

"Couldn't communicate with a helper application" in Xcode
 
 
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