Hello, a SIMPLE search of "vector robot error codes" produces this website
https://support.digitaldreamlabs.com/article/96-vector-status-codes
with this info
* ***800 - 999***
** ***If any of these Status Codes consistently appear, there could possibly be a hardware issue with Vector. Startup into Recovery Mode, Clear User Data, and use the Vector app to Reinstall Vector’s OS.***
More specifically
***920 VIC_GATEWAY_CERTVic-gateway-cert was unable to generate a x509 certificate for vic-gateway***
So, I am sure you tried that first, right? So, what don't you understand?