I also got an error message when I tried to sign up. I didn’t fill in the CPR-nr. (Tax ID) field but I doubt that was the cause. This is what the message says:
Der opstod en serverfejl. Prøv venligst igen. Skriv til os på donation@giveffektivt.dk hvis problemet opstår igen. Hvis muligt, så fortæl gerne, hvordan man kan fremprovokere fejlen.
I also got an error message when I tried to sign up. I didn’t fill in the CPR-nr. (Tax ID) field but I doubt that was the cause. This is what the message says:
Hi Vesa. So sorry that I haven’t followed up on this. This issue was fixed shortly after posting this!
I understand they have fixed this issue, but if not, just contact them directly.
I signed up originally with an abbreviated version of my national ID number, but they preferred to correct the system and have the accurate number.
Fwiw I was able to sign up by using the nine digit alphanumeric code on my German passport.
Thanks for trying, fingers crossed you’re able to join—signing up seems high leverage!