Clear the cache of project using this command:

php bin/console c:c

in your project root directory. Now try setup again of UVdesk.

Try with 2 method: Manual Setup:
Make a try once manual setup of UVdesk.
Check the below link for the manual setup from here

Note: Once you clear the cache of your browser and the project cache.

If still facing the error please let us know.

Mail your query to us at support@uvdesk.com. Our team will help you.