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If you have done the DB export/import from any other environment, other server reference entries also comes with this and causes such errors. Please refer below community thread to remove unwanted entries from those form.
Verify your ARS license is correct. We did a DB restore from one environment to another and forgot to update the license key. When I tried to modify and save an existing transformation I received an unhelpful Java exception error. When I created a new one, I received an error message indicating the server wasn't licensed. Odd that you can save jobs but not transformations. Anyway, hope that helps.