I have posted something similar on another forum, so apologies if anyone is already aware of this problem.
Not being a high mileage user, it wasn't until mid September that I needed to charge my car at home on my EO Mini Pro2. When I tried, I kept getting error messages and the light in the car's charge port turned red. I rang EO support to get some help. Anyway, to cut a long story short, it would appear that after the 12v battery swap and v2.4 software update, there appears to be a problem with my EO charger talking to the car. Since first reporting the problem, EO have been in contact with VW in Germany, who recognise there is a problem and are now working with them on a solution.
Although inconvenient, I have been able to charge my car at Tesco on one of their 7kWh chargers and also on a granny plug charger at home.