Hi AFisher1,
Please make sure proper Account Url, Email or API Key and Password are entered.
After signing up the Freshdesk, an email will sent to your email address with the subject “Activate your Freshdesk account”, at there you will be able to get the Account Url.
Then enter your email address or API key and Password.
Then with the Freshdesk being logged in, click the Create button, you will be able to create the connection without issue.

Under Connections, you will find that the connection has been created successfully.

Please try again with it.
Best regards,
Mabel Mao