Make sure you are including the /maximo in your URL. For example, if your Maximo environment is hosted at https://mydomain.com you should have the URL provided as https://mydomain.com/maximo
Different customers use different contexts so we require the customer to provide it. Your log attempt shows us trying to access it at just /api instead of /maximo/api which is most likely the issue with it not being retrieved.
As for the version mismatch, these applications should be getting loaded when you run updatedb. Can you confirm the new version was loaded into mafappdata for each of the applications?