Brand shared, not working

[default33052683g1m7sd]

I shared a brand with my colleagues, they accepted it, but it is not visible for them

[Rebecca25484464p89n]

I am having the same issue. When my colleague clicks on the email to accept, the following message comes up in Adobe Xpress... 'Request Edit Access - This brand or library is not available. If you believe you shoul have access, ask the owner to share it with you'. We can share and collaborate artwork files but cannot share branding.