Bug Unity 2019.4.12f1 is not launching or working

Everytime I try to run a project with Unity Editor 2019.4.12, it shows that my mouse is loading but nothing ends up showing up. It is, however, able to run 2019.4.40. I have tried uninstalling and reinstalling Unity several times, but shows no change. I have a free personal license with an activation date of June 6 2020. Please help me (I want to use this particular editor).

This error might be associated with the process, I found it on editor log:
{"timestamp":"2022-12-28T14:37:38.570Z","level":"info","moduleName":"LaunchProcess","message":"[ 'child process exited with code 4294967295' ]"}

 

Not what you want to hear, but why do you want to use .4.12 instead of .4.40? It's not a supported version. What version is the project built with? Can you launch a new project with .4.12?

 

The version the project is built in should be .412. I'll post the project template here as a zip for reference. I want to use this particular editor because otherwise it won't work as intended in a game I'm trying to mod (or so I hear).

As for if I can create a new project with that editor, the answer is unfortunately no. But that's because of an "Sample Project could not be opened. Please check the logs." error. I can however create a new project under editor .440

 

Creating a new project shouldn't try to open any 'sample project'. You need to work on getting 4.12 to launch on an empty project first. Once that's working, you can try opening an existing project.

I just installed 4.12 and created an empty 2D project with no problems, so there's no obvious bug/issue here.

Edit: I was also able to open your .zip project without issue.

 

This is what happens when I try to create a new project for editor .4.12
What could this mean?

 

Don't know. For convenience I'm embedding the text for other users rather than open a text file:

 

After uninstalling and reinstalling everything nothing worked and in the log it shows exactly what is above in addition to "{"timestamp":"2022-12-28T14:37:38.570Z","level":"info","moduleName":"LaunchProcess","message":"[ 'child process exited with code 4294967295' ]"}"