how can i integrate a knowledge base with portal?

[Laura Beatriz Luna Maia]

i already have the space, but when i select "link spaces"  nothing appears, and i cant associate them, i dont know how should i do this

[Nikola Perisic]

Welcome @Laura Beatriz Luna Maia 

When you go to project settings > Channels & service > Knowledge base and see the settings for your spaces:

[Dan Breyen]

Hi @Laura Beatriz Luna Maia welcome to the community!  If you haven't yet, I would suggest taking a look at this setting up your Knowledge Base article from Atlassian.  There's some setup in JSM and Confluence to get the two to be talking together.

When I was setting up mine, I went through that document and it worked like a charm.

Hope that helps.