Error changing an expression tag

I tried to add a new OR’d term to an expression tag and saw this error for the first time, I can’t edit the tag now.

GatewayException: Results for asynchronous rpc call were not received within the specified amount of time [60000 ms] for task '88c7441e-62cc-4de4-93ee-bb6da1f73ccf' caused by TimeoutException: Results for asynchronous rpc call were not received within the specified amount of time [60000 ms] for task '88c7441e-62cc-4de4-93ee-bb6da1f73ccf'

After restarting the designer, the error went away. ver 7.6.4

Are you still not able to edit that tag after restarting the designer?

Haven’t had another problem with this.
Not too sure what actually happened.