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This error message typically occurs if the TARGIT server is not running, or if the user running the TARGIT server has been changed.
Solution
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First, open Task Manager and ensure that TARGIT Server is running.
Afterwards, run the following commands in an elevated command prompt:
NETSH http show urlacl
Locate the reservation on port 1301 and note if it is specified on http or https.
Next, run the following commands, making sure when you delete the URL reservation that you use the http or https depending on the current reservation.
NETSH http delete urlacl url=https://*:1301/
NETSH http add urlacl url=https://*:1301/ user=<domain>\<username>