Hi, 
All PDI's are working fishy. Some or the other issue is being encountered. The only solution is to wait.

Facing the same issue. Any updates so far?

Hello

I'm also facing the same issue since morning tried changing network, browser and system as well however issue remains same it keep on loading

Best Regards

Uday

@Christian Dave2 , @nick133700 @wemmersroy and all, this issue has been fixed now (refer below). please try now.

https://www.servicenow.com/community/developer-blog/incident-developer-site-restored-and-pdi-availab...

The issue doesn't seem to be resolved yet—all my PDIs are still stuck hibernating or loading.