What’s Happening & Why:

...

If the computer does not have this profile – or if the screen above seems to be missing the buttons or some text –  try running this command in Terminal first:

• sudo jamf mdm

(requires an administrative password)

Device Signature Error - A valid device signature is required to perform the action

If the profile still does not appear a few minutes after running that, or you get the error "Device Signature Error - A valid device signature is required to perform the action" - then run this command:

• sudo jamf enroll -invitation 300038473241579968527602539414630562143 -noPolicy 

When the profile shows up, you must click the "Approve" button in order to finish the process:

...