Developer Console Error: 'Destination URL not reset. The URL returned from login must be set in the SforceService'

Steps to Resolve in Developer Console

Follow these steps to resolve the error when it occurs in the Salesforce Developer Console:

1. Log in to the affected Salesforce org as an Administrator.
2. Go to Setup.
3. Navigate to My Domain:
   1. Salesforce Classic: Domain Management > My Domain
   2. Lightning Experience: Company Settings > My Domain
4. Under My Domain Settings, click Edit, then click Check Availability. You do not need to save.
5. Attempt to open Developer Console again.

If Using Apex Data Loader

If you are experiencing this error with the Salesforce Apex Data Loader rather than the Developer Console, refer to the dedicated Data Loader article in the Additional Resources section below.

If Issue Persists

If the above steps do not resolve the issue, contact Salesforce Support. Support contact information is available in the Additional Resources section.