The Add-on & Subscription Center cannot be accessed

With the release of the i-doit version 33 the Add-on and Subscription Center was added to i-doit.

If an error occurs while trying to open the Add-on & Subscription Center, the following needs to be checked:

1. Can the server reach the following addresses?
   - crm-gateway.i-doit.com
   - licenses.i-doit.com
   - center.i-doit.com/portal/
   
   To access the Add-on & Subscription Center, the following IP addresses must also be enabled for the firewall or proxy:
   159.69.103.121
78.46.236.49
2a01:4f8:c01f:289a::
2a01:4f8:1c17:a07c::
35.158.127.51
35.158.127.52
35.158.127.53
159.69.103.121
195.46.236.49
   You can find more information on this topic here.
   
   
2. Is the license token in the Admin-Center (Licenses tab) and in the “Config” tab the current token?
   If there is a different token than the current token, then insert the current token.

After you have checked these steps, the Add-on & Subscription Center should be accessible.