Airstream Interstate 2018 - Main battery not charging.

[GTX]

I need your ideas and help about this issue:
- I can’t start the RV from the main battery, I have to press the button to use the house battery.
- Once the RV is running, it is charging the house battery, but it is not charging the main battery.
- When I connect it to external electricity, it charges the house battery but not the main battery.
Before this issue, I had another issue when I stop sometimes, I hear a continuous clicking sound from the front of the RV (sprinter van, like on and off), maybe related or maybe something else.

What should I look at? Any ideas of how to resolve it?

[GTX]

It was a battery issue, I changed the battery