Cant open collabora online

I have installed nextcloud on my ubuntu server and installed collabora online using this kb

i have set the domain to

have set my online server too

the process i am doing is going too

opening a document and it gives this error
"unautohorized wopi host"

Not sure whats causing this, but any help would be great!

Without web server config, docker container startline, version of installed NC and richdocuments - nobody help.
It might be worth to join this topic Collabora - unauthorised WOPI-Host , they are discussing the same problem