I think this may have been me!
In my case the charger was installed some time before the car arrived so the problem never interfered with actual charging. But very soon after the initial installation I several times received messages from the ev.energy app that it could not communicate with my charger and that I needed to reboot it (the charger). Easily done, but the problem kept recurring.
So I contacted the installer who, in turn, contacted the manufacturer (Rolec) who made various suggestions, including changing the charger's modem. All to no avail. Eventually a clearly clued-up techie at Rolec suggested checking the incoming voltage to the house. According to the regulations it should be between 216 and 253 volts; measured by the installation engineer it was 255/256, hence the PEN (overload) protection was activated and so disconnecting the charger.
This was reported to my DNO (then Western Power, now called National Grid) who came out and checked the incoming voltage. It measured 258! They then went to my local substation and adjusted the supply voltage. They then attached a monitor to my incoming supply, left in place for one week, to check the situation had been rectified; it had.
So, if you potentially have an issue with your supply voltage you need to contact your charger installer and/or your DNO and ask that they come out to your property and check it. It is the DNO's legal duty to maintain the supply voltage within that 216 to 253 range. If yours exceeds the upper limit they must take steps to reduce it.
HTH