Help upload 20w14 infinite worldlive_help

Hello everyone,

first of all thank you fo taking time to read this...

So I want to create a server with my friends, the idea was to choose one "20x14 infinite" dimension but in 1.16

I have the dimension file, but can't manage to upload it to my server.

the Dim(Bignumber file) and it works for other dimensions but, not this one

maybe it's just not possible, Idk

if someone can help me, or if someone doesn't understand the issue, please say so

good afternoon

Canycoiff