Description of the problem: When unityhub opens the project, it displays the project for a few seconds and then returns to the hub interface, and the project is not opened successfully
Possible causes and solutions:
Reason 1: Caused by the expiration of the license - most of them are caused by the expiration of the license, just obtain it again.
Reason two:
Reason three:
Reason four:
Reason five:
My solution: download an old version of unityhub