Wifi dongles not connecting to network

We have 2 AC3.0 inverters and yesterday both dongles have decided not to connect to the router- meaning no idea whats going in.?

Is there any known reason (ie change to software/firmware recently) and any advice what/ how to check ? I have turned off the inverters and restarted them… one dongle occasionally connects for a couple of hours but the other just flashes blue LED..?

Will system manage its self ? Appears the nightime boost didnt goin in last night??

P

Just to update that I looked through previous threads and @MarkyG82 ’s advice in previous thread about this worked for me - switching SSID name on router and then switching back… Dongles connected…. No idea why as everything else was connecting but it did the

Next quirk now is one Dongle shows it needs a password and one shows it doesnt need it on my wireless connect page of my phone? ! Even after I forget the network.