You won't be able to use music or sound clips in your videos if your TikTok account is set up as a Business account. You can switch to a personal account via the "Manage Account" settings in the TikTok app. For more information on Personal vs. Business Accounts on TikTok, check out their article here: https://support.tiktok.com/en/using-tiktok/growing-your-audience/switching-to-a-creator-or-business-account
Uploading your release as an original sound instead of selecting it from the TikTok Sound Library will cause your video to be muted. The best way to use your music on TikTok is to add the song to your video using TikTok’s Sound Library.
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