Hi there,
I don’t know why.
Are you sure that it’s not created? How are you checking?
If the page is certainly not being created, then it looks a lot like a conflict with some other code, so the next recommended step is the conflict test:
??*Briefly* disable all other plugins and enable the default Twenty Nineteen theme. If this fixes the problem, as it probably will, enable everything one by one, checking each time to see when the problem returns.
Please let us know when you find the conflict so that we can take a look and see what we can do about it.
Best of regards,
Gabriel