[rpcameron]

Um. Not sure what version you are using. For Krypton, current HTSP client is 3.4.10, which is required for beta 7 and later. Earlier versions of Krypton can use 3.4.9. 4.0.0 is the development version of the addon for Kodi 18/L*.

Nowhere in the pvr.hts repository do I see version 3.4.12.

However, current stable Tvheadend is 4.0.3. Development is 4.1.x. I would recommend upgrading your Tvheadend installation. Also, check your version numbers again ...