I just installed AviaCDU and Overhead for MSFS 2024 and the PMDG 777-200ER. I realize this plane is brand new and might not be supported yet, but since my problems are similar to what some people have described earlier in this thread (e.g the last post) I thought I'd mention my problems here.
AviaCDU: he CDU itself is shown in the browser window, I get audio and visual feedback when I press buttons, and the button presses reach MSFS, but nothing is shown on the AviaCDU display. I tried Chrome and Edge on the MSFS machine and Safari on an iPad. Tried turning off the MSFS machine firewall too.
AviaOverhead: the overhead panel is shown with all the green and amber (OFF, VALVE, ON, AVAIL, ON BAT, ...) text lit up. If I press a button (e.g a fuel pump on) it is registered by MSFS, but there's no change in the AviaOverhead display (except that the On briefly is shown). Tried Edge and Chrome on the MSFS PC as well as the aviaOverhead binary client installed on the MSFS computer.