Meross, Tasmota, SolarEdge, Ecowitt not working past car-2021.3.4

Tried every new update and trawled the forums etc for solutions, nothing i found worked. After being reliable for a couple of years it is now crashing every couple of days. If I update I lose most of my switches, weather, solar and all automations. So stuck at 2021.3.4, any ideas on where to look.