• Minecraft 1.17.1
• Chunk Loaders 1.17.1

Steps to Reproduce
-Launch Game

Crash report (~/logs/latest.log)[17Oct2021 17:00:08.837] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, TheCyanPhantom, --version, 1.17.1-forge-37.0.32, --gameDir, C:\Users\Theo Hallgren\AppData\Roaming.minecraft, --assetsDir, C:\Users\Theo Hallgren\AppData\Roaming.minecraft\assets, --assetIndex, 1.17, --uuid, 2674545b5e814c309d8e3ce7425111b2, --accessToken, ❄❄❄❄❄❄❄❄, --userType, msa, --versionType, release, --launchTarget, forgeclient, --fml.forgeVersion, 37.0.32, --fml.mcVersion, 1.17.1, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20210706.113038]
[17Oct2021 17:00:08.845] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 9.0.7+91+master.8569cdf starting: java version 16.0.1 by Microsoft
[17Oct2021 17:00:10.363] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'forgeclient' with arguments [--version, 1.17.1-forge-37.0.32, --gameDir, C:\Users\Theo Hallgren\AppData\Roaming.minecraft, --assetsDir, C:\Users\Theo Hallgren\AppData\Roaming.minecraft\assets, --uuid, 2674545b5e814c309d8e3ce7425111b2, --username, TheCyanPhantom, --assetIndex, 1.17, --accessToken, ❄❄❄❄❄❄❄❄, --userType, msa, --versionType, release]

Closing this as I can't help without more information. Feel free to reply here and I will reopen the issue.

Please update to a newer version of Forge.
Also, do you have the dependencies for Chunk Loaders installed?
https://www.curseforge.com/minecraft/mc-mods/simple-magnets/files/3434655