DaemonUmbra

Are you running Optifine? If so, remove it.

Can you provide your launcher_log.txt?

Rerun genEclipseRuns and don't touch MOD_CLASSES, modifying it was a workaround for an issue that was fixed and once again things weren't updated.

Yes

https://adoptopenjdk.net

Forge for 1.12.2 and earlier only works with Java 8, your computer is trying to use Java 9 or later

According to the image you cd-ed to your desktop but not into that folder

What do you get from the ls command?

Please provide a screenshot of your terminal window

Well first you need to navigate the terminal to where the jar file is, please look this up yourself.

Try launching it from terminal by invoking java -jar [filename] and post the output.

The filenames of some of your mods suggests you are not getting them from official sources, please read my signature for more info on why this is a bad thing.

You...remove it from your mods folder...

Their dependencies string is "required-after-client:ptrmodelib@[1.0.3,);after:ptrmodellib", I'm not quite sure what's wrong there.

Try removing or updating Optifine

Update or remove Optifine

1.7.10 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

Update Forge.

If you don't have other poorly made mods.

Endercrack's author has no idea about making their code sided. Edit: Their item class's constructor has a DIRECT reference to a static method in their ClientProxy. ?‍♂️

That doesn't look like the whole log, do you have FTP access to your server? If so please provide your debug.log using one of the sites in my signature (I prefer Gist since their limit is HUGE, but they do require you to make a free account).

Yes

Plustic

You set up the repo wrong, you want the root of the repo to be in the same place as your build.gradle and .gitignore files

DamageIndicators is broken/poorly made, complain to the author.