1.16.1 wont start in the launcher

[SemmieDev]

First, I know there is no 1.16.1 release yet, but if I download it straight away its set on 1.16.1. I know its most likely not supported because of that. But maybe someone can help me fix this?

Anyway so what happened is I just build the client (it has some small modifications) and I copied the data and assets folder into it, copied a json file over, renamed everything, changed the json so it won't download the vanilla jar again and changed the id in the json. But when I started it, I got this crash: crash-2020-07-13_20.14.46-client.txt

Please respond if you know how to fix this.

[ramonrpa]

I've got the same problem

[ramonrpa]

I managed to fix the problem. You only need to copy the folders: data and assets to the final jar. After that, you need to create the pack.mcmeta inside the final jar with the following informations:
{ "pack": { "description": "The default data for Minecraft", "pack_format": 5 } }

[SemmieDev]

That makes sense, thanks!