We upgraded from version 9120 to 9200 with "updatemanager" batch file. The process finished successfully but we have some issues in the admin site.

When we try to set anything we got a blank page and nothing happens. For example we tried to add a technician and click a letter to jump in the requester names the site goes to  " https://servicedesk.orgdomain.hu/RequesterDef.do?startsWith=r" but nothing appears in the browser.

We tried it in different browsers like Chrome, Firefox, IE and Edge with same result.

The OS is Windows 2012R2 with the latest updates.

How can we solve this?

Thanks in advance,

Sandor Ujhelyi