Hi Luca,
WPB its an "Jack of all trades" a proper course is recommended .
Regarding the technical problems: i was serious!
There is the strong support organization for WPB and no support is sitting in India- means you still talking to the wrong people and you will get the wrong answers.
I offered you to send me the Ticket No I will route this to the right people.
Middleware is required SCI and Okta i have used - no issues.
Licences can be checked in the system, but your company is invisible for me.
Best Regards Thomas