What many folks forget is that the SkyBridge Plus is a computerized device, and as such, it should always be shut down properly. If it is not, it may be incomplete in its closing of important files, resulting in the Initializing Error.
TO FIX THE INITIALIZING ERROR
To Correct the error, the screen Display Type that the SkyBridge Plus needs to be set as shown:
Be sure that this last row shows Nextion, Modem, ON7LDS L3. If not, set the appropriate field and press the ApplyChanges button. This should completely fix the initializing error.
If you are still experiencing this error after this fix, or if other fields in the configuration are showing BLANK, then let us know by submitting a ticket with detailed info, as the SD card may have been corrupted, requiring additional work.