I updated to quark b104. I can't open any world, Tried creating new worlds and it's the same.

Here is a superflat creative one.
crash-2017-08-05_13.18.52-server.txt

Here is a new default survival one.
crash-2017-08-05_13.23.40-server.txt

Disabling the feature fixes the problem

Update forge

I've got the last "Stable" Forge update (14.21.1.2387).
If you mean I should download a nightly build, I suggest you mark the version as Beta in curseforge instead of Release.

Release versions should depend on release/stable/recommended versions, and never on experimental/nightly builds.

No worries though. As I said before; disabling the feature is enough to avoid the crash.