Hi,

It seems that this could be an issue within the API client. So this has nothing to do with i-doit itself. I recommend to raise a new issue. While doing so please post some more information, e. g.:

API client version

Complete output of make initialize

Used PHP version and operating system

I am able to reproduce your second error with the latest version of the API client and PHP 7.0.8 (Ubuntu 16.10).

Greetings,
Benjamin