Missing English Translation + Server Not Starting Up

[Joooles]

I have a server and I've been trying to start it up with some mods, and it's not working. I'm assuming it's because of the English translation and the line like this one:

 

"Mod improvedbackpacks is missing the required element 'version' and a version.properties file could not be found. Falling back to metadata version 1.12.2-1.5.0.0"

 

Full Console Log: https://pastebin.com/DCmeKJTT

[LexManos]

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.