Issues with adding/Using mods via UME

Hello Everyone!
So recently I’ve been experiencing an issue with creating mods for GDT. Everytime I put together a small expansion package for the game with the latest version of UME, I place the content inside of the 7.Zip folder into the mods folder for GDT, and enable my custom mod, which I then restart the game and prepare to try out my mod. However, I am met with an error message (Which I’ll post tommorow). I do have other mods active if that has anything to do with it not working, however It has gone on for awhile and I’m unable to add any new mods. If anyone knows a way to help/fix this, that would be greatly appreciated!

UME doesn’t work properly, it’s outdated, maybe that’s the cause.

Are there any ways of creating your own GDT mods? Like other alternatives besides UME?

The Game Dev Tycoon Modding Wiki. Basic knowledge of JavaScript and jQuery will allow for basic mod creation.