Hi @codexrahul 

ServiceNow Support Team  is working on it to resume all affected PDI 

Please refer:  Incident: Developer Site Restored and PDI Availability Issues

Since 23rd July'26 morning , many community members also  reported the same.

Wait for some time. At some certain interval Refresh the instance from developer portal.

Do not worry. It would be working as before.

Wait for some times. From Developer portal Keep refreshing .

There is no support available for PDI .