server running on linux, opus codecs grayed out, cannot select

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I recently built a new server on a linux vps and on entering with the music bot i cannot set the audio on the channels to opus codecs. Why would this be? Any help appreciated. When i type in opus codecs grayed out into google i can only find one post which didnt work and gave the error server group... server running on linux, opus codecs grayed out, cannot select