Dear,
I just encountered this message on https://online-go.com/user/supporter
Error: Missing interpolation key: supporter.purchase.price for string: Momenteel steun je ons met ${{supporter.purchase.price}}
1 Like
That means the translation for that string is incorrect in that particular language. Iām sure a translator will fix it soon, or you can do so by making yourself an account on https://translate.online-go.com 
2 Likes
Hi, I just made an account and encountered this:
English
You are currently supporting us with ${{amount}} per month from your paypal account, thanks!
Momenteel steun je ons met ${{supporter.purchase.price}} per maand vanaf je paypal account, bedankt!
The translation itself is ok. It seems the variable supporter.purchase.price in string ${{supporter.purchase.price}} is not collected.
Not a translation issue for me to tackle I think, alas.
1 Like
Translation would be like this:
Momenteel steun je ons met ${{amount}} per maand vanaf je paypal account, bedankt!
The UI server is looking for a variable named amount and instead it gets the unknown supporter.purchase.price.
1 Like
Of course 
Done!
2 Likes