Collabora Newbie

Well i have Nextcloud Proxy working in one server with the domain ex : https://box.com the second server has docker nginx with the domain office.box.com , when i configure the collabora and opened say SSL invalid and i have everything with certificates whay i miss and the mesange cat /etc/loolwsd/ca-chain.cert.pem >> /resources/config/ca-bundle.crt any help thx