Collabora Online No Proxy

Currently preparing a nextcloud, I would like to integrate Collabora Online,
I would like to know the configuration of the Host file to perform in order not to use a proxy. SSL Certificate purchased for only one domain and not domain and subdomain.
After configuring the HOST file I have nothing in nextcloud and an error message in log apache:

My nextcloud is accesible via c **. *** .com: 666

[Mon Jan 02 17: 11: 03.105404 2017] [ssl: error] [pid 12849] AH02604: Unable to configure certificate **.
[Mon Jan 02 17: 11: 03.180876 2017] [ssl: warn] [pid 12850] AH01909: **. ****: 666: 0 server certificate does NOT include an ID which matches the server name

I can provide the host file if needed

Sorry for English beginner, translation by google translation