Yarn fails to remap

I am trying to setup the mappings and yarn stuff. I tried several things, like changing java version and such. I get this in the stacktrace: "Caused by: java.nio.file.NoSuchFileException: /root/.mcmodding/emc/yarn1151/1.15.1-intermediary.jar". Could someone please tell me what to do?

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information