Linux api not accepting 3rd party server address

Trying to use the set up for Nextcloud on Linux. I am using a third party cloud and I cannot get the URL address to take. I have tried it with the Good Cloud and also with another third party service just in case there was an issue with the Good Cloud. Still giving the same error message: Failed to connect, host server not found.

No issues at all with it working on my phone- didn’t know if I am missing something. And it is the API and not the SNAP version I am working with. Any help would be appreciated. I just gave permissions to the API to execute and tried logging in as a user in the welcome box and this is where I am getting the error message.