No Power Output - drexjj/sbitx GitHub Wiki

Numerous sBitx owners who are not fluent in English may try to change the default display language to their preferred language, only to discover that their sBitx is not transmitting any power after the change.

This is a phenomenon that exists in both the stock and 64 bit versions of sBitx application and may be occurring due to missing language translations in sBitx code.

Workaround:

You can set your Raspberry Pi language to en (English) in the Raspberry Pi Configuration - Localisation area.