internal server error with setImpersonation

[bilal-app4legal]

Version (e.g. 1.0, dev-master): PHP version: Microsoft Exchange version: 2016

Description of problem: i am using Exchange Impersonation to login, and use

$client->setImpersonation($email);

but when creating any request after login i get:

An internal server error occurred. The operation failed.

note: i just stop setImpersonation and use the basic login by using email/password directly it is working normally.