question

I am fixing at the moment a system here in Panama from a customer.
The company who installed the systems made many mistakes in the wiring and also in the configuration of the system:
1 Quattro 48V/10k/120V (like in the US, 60Hz)
1 very old MPPT 150/70 (I hardly find information about that device)
1 VenusGX
2 LiFePo4 batteries each 100Ah, total 10kWh
1 Shunt with BMV
8kW Solarmodules
1 AGG generator (wrong wired. not connected at the moment)
Grid connection (no feedback desired, same grid like US)

I changed some DC cables, fixed some lugs, changed burned fuses, changed the wrong wiring of the chinese batteries. The system was a mess...

There are two problems:
1.
I fail to connect the BMS CAN bus with the VenusGX. I changed the cables, I had contact to the vendor, did updates on the batteries, changed the setting in the battery SW to "Victron".
Here is the screenshot of the CAN port 2 (this is a VenusGX, not a Cerbo).

What can cause an "Err passive" and a "Bus warn". The vendor sent me video and there you can see that the BMS is working with Victron. On the test setup they use a cerbo. Can be using a VenusGX cause that issue?
The bus speed is set to 500kbts.

2.
ESS is not working at the moment. All the time I want to turn it on, I get an DV Voltage Sense error and the Quattro makes strange noises and finally shut off. I never had this and have no idea...

So I am forced to use the Virtual switch for self consumption at the moment.

So my questions for problem 1 and 2 are:
Can it be that I have wrong settings in the the VE.conf or in the Remote Console?
Or can it be that the old MPPT is causing that issue?

I was searching in the documentation and also here in the community, but I found nothing.

Any help is appreciated,

Thank you,
Michael