It took a while for the webmin to respond.

However i was not able to login with my admin password? (tried it later with root, and webmin did not respond anymore).

You said the script also did reset the admin pass.

I wonder if my password special characters where not being escaped properly, and set the webmin admin password to something else.

Password contains #@!  so if those are not escaped the right way in the script, it might break the script.