When attempting to schedule a clone, the instance scheduler can sometimes get stuck and often hangs with the popup screen: "Confirm Destination Upgrade/Downgrade" - Known Error

When attempting to schedule a clone, the instance scheduler can sometimes get stuck and often hangs with the popup screen: "Confirm Destination Upgrade/Downgrade" Description When attempting to schedule a clone, sometimes the request gets stuck trying to verify the target instance and does not complete the request. The screen often hangs with the pop-up message 'Confirm Destination Upgrade/Downgrade'.

Steps to Reproduce

Log on to your source instance. Attempt to schedule a clone to a target instance. NOTE : The issue only happens for users who have current browser cache for the instance, also does not happen to all clone attempts.

Workaround Before scheduling a clone:

Log on to the clone source instance using a browser with incognito or protected view, so to not use your browser's cache.

OR

Clear your browser cache. Related Problem: PRB1156906