Authentication Error when Running a Report via an external URL call via curl yet it works when logged in via the browser

I am trying to call the following url

curl -u manager:Manager123 -i ''

which works, yet

curl -L -u manager:Manager123 -i '!7c8301e3-439e-4084-a9f1-dad1a2b6e3c3'

throws an API Exception in the link below

Any advice for what the root cause is and how to resolve it

Are you sure you are not getting a? HTTP/1.1 404 Not Found