When you start Agility Professional there are times an error occurs Unexpected Erro:File\Path not found.
This is connected with the mapped drives on the system.
For many sites now the templates location is recorded directly into the registry to eliminate this error.
The cause of this error is when the mapped drive disconnects from the local PC.
The screenshot below show drives which are accessible and some that are not with red x on them:
So when you select This PC in File Explorer normally on the task as a folder
if not there search for file Explorer by pressing the windows key
this is win11 or
win10 etc. normally located on the taskbar also.
Template drive is normally T: If this has a red X like in the above example click on it and see if it opens if it does Agility will respond.
If it does not open then you will need to contact your hardware company to resolve the issue.