Requirements:
Single working company

Steps to reproduce:
1.  Create member of company with role ID that is not Company Buyer or Admin. (it can be e.g. Anonymous role)

2. Try to anything more related to this company(e.g. edit it from the backoffice UI)

Actual result:
Error 500

An exception has been thrown during the rendering of a template ("Notice: Undefined offset: 0").

Creating this type of sure makes data corrupted and there is no fix from the UI side.

Expected result:

There is some safety mechanism.