Minecraft, Version 1.16.5-forge-36.2.39
Mod version: modernfix-forge-5.4.0+mc1.16.5

Rechiseled, Version rechiseled-1.1.2-forge-mc1.16.jar
The textures do not appear correctly, I tried disabling CTM optimizers and not interfering with Fusion mod, but the problem persists, UPDATE everything to the latest version.

Update the mods
fusion-1.0.3-forge-mc1.16.jar
supermartijn642configlib-1.1.7-forge-mc1.16.jar
supermartijn642corelib-1.1.12-forge-mc1.16.jar

Seems that a fix will be made on Fusion's end: SuperMartijn642/Rechiseled#47