P1 meter homewizard: not able to authorise

I’m new to home assistant and when I try to get the p1 meter authorised I always get an unknown error has occurred.
I’m on the newest HA and have a WiFi p1 meter with software 6.03
What can be wrong?
thanks!

Have you set “Lokale API” to ON?

Yes I did. First it worked alright. But then I transferred it to a new WiFi. And homewizard was down for a couple of days, so maybe that’s what is wrong.