All my display have yellow status

Hi, i can’t push new configuration to 4 display, i got 1 working good but the other one have a yellow status. I know if i delete display and start from scratch they will work again. I have already do that 2 times, but now i come here because i am tired to do this workaround.

I got android box on wifi, the android box work well, i can go on internet. The CMS said the display is connected…

Someone have an idea ?