I've experienced that Google Cloud Shell Editor doesn't load, it keeps on loading resources forever. I've tried to restart my instance multiple times. I've changed projects, trying the boost feature, I've even reset my home directory, but nothing works. I've experienced this before and then it has resolved by itself after a few days. But that is not an optimal solution since I'm a frequent user of the editor. Today I experienced it again.
For others who might have this problem: turning off my AdBlocker solved this issue.