On the 1.18.2-2.0.5 release of the mod the Gui of the chem combiner and disolver are clashing with the player inventory, with the disolver at least being usable but the combiner is unusable.

What other mods are you using? It's clear that there is some other mod being used to change the color of the screen.

nvm found the issue an file in the modpack Encrypted chaning there texture and causing a clash

Please make sure to cross post this issue to them so they know to fix it!