Re: Cannot apply multilingual profile
Is that server (where your tiki is installed) behind a firewall proxy? If so, you'll have to add the proxy information for the profiles to work, since they attempt to fetch data from profiles.tiki.org in real time.
See:
https://doc.tiki.org/General+Settings?highlight=proxy
You can also try the Profiles Wizard, if that is easier (but after configuring the proxy info, anyway, if that is your case being behind a firewall)