If you see this error - 'The SQL instance name do not match with the licensing key information' in a Error Loading Widget screen, It could be the following reason.
You recently changed your environment details by going to the Settings page and editing the Environment and you updated the Server name where the BizTalkMgmt database is stored.
Although this might be right as you are now wishing to move your BizTalkMgmt database to another server, the licence was linked to the server names of the BizTalk server.
So the process to be followed if you wish to change your environment details is as below.
1. Deactivate the licence.