https://www.victronenergy.com/live/ve.bus:ve.bus_error_codes
Error 11 is there, with steps to test.
Also found this …
https://community.victronenergy.com/questions/2709/multiplus-ii-and-vebus-error-11.html
And this … mine was weird, 8 am AFTER LS started … my suspicion on the end was the panels and their wiring.
But lots of ideas to try there.