After the game finished loading, the screen just turns black instead of showing the main menu.
I'm using multiple different mods with the JET modpack for 1.7.10, which can be found here:

https://github.com/UeberallGebannt/jet

The log: https://paste.atlauncher.com/view/e4a969d2-1177-4dd8-8a8c-21ab1e750647

The splash.properties file has been reseted to the default values.

Here is the (incomplete) modlist on curseforge https://www.curseforge.com/minecraft/modpacks/jet

Nevermind, this was not an issue with ModernSplash, I made a simple mistake while adding the mod. Sorry for bothering!