with the update to version 18.04, when I update survey solutions tester to this version I receive an error saying "provided survey solutions designer URL is invalid. check settings." with error am unable to load or test any of my questionnaires on however am able to access designer and tester via the CAWI portal.
Thank you very mush for reporting the issue. I can confirm the error is on our side. Unfortunately, the only solutions is to uninstall the Tester app and install it again.