✓ Accepted answer
Definition of Your Error
Your error means that there were no assets matching the prerequisites for the require function to be called.
Prerequisites of the 'require' Function
The Asset you're attempting to call the require function on must be a ModuleScript.
The Asset must either be owned by you or be open-sourced.
The Instance that the Asset contains, has to be named 'MainModule' if it's expected to be able to be called upon by the require function by it's ID
Summary
So, I suggest you check all of these prerequisites and make sure nothing is out of place. If the problem persists then please comment below.