installed Nextcloud 13 and setup collabora on docker (ubuntu16.04). All are working good. but the issue is when i try to open any odt or xls file it give an Error for " Unauthorized WOPI host" .
i have done nextcloud 13.1 and 13.2 but the same error i am getting. So please help me this out. I dont know what kind of issue is this. Please Help.