Mautic 4 Api question

Your software
My Mautic version is: 4.0.2.
My PHP version is: 7.4.23
My Database type and version is: 10.3.31-MariaDB

Your problem
My problem is:
Hi,
I’m trying to connect my Mautic 4.0.2 to integromat with the OAuth2 credentials and get this error in Integromat: [404] Requested URL not found: /mails/api/users/self
And when I check the installation folders there is no /api/ folder

What to do next?

These errors are showing in the log:

Steps I have tried to fix the problem:

I would suggest checking out this link: GitHub - mautic/api-library: Mautic API Library

I had some similar issues a while back and if I recall correctly I downloaded the library and copied it over and all was working.