this is what the log says
21:22:10.576
Preparing to launch minecraft client for 1.18-forge-38.0.17
21:22:11.444
Minecraft client 1.18-forge-38.0.17 is ready to start.
21:22:11.445
Starting!
21:22:12.095
Version does not support log configuration, will assume one plaintext entry per line
21:22:14.127
2021-12-13 21:22:14,117 main WARN Advanced terminal features are not available in this environment
21:22:14.297
[21:22:14] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, cringyboiiiiiii, --version, 1.18-forge-38.0.17, --gameDir, C:\Users\Ben\AppData\Roaming\.minecraft, --assetsDir, C:\Users\Ben\AppData\Roaming\.minecraft\assets, --assetIndex, 1.18, --uuid, e1c40e5b9d384cb0b8589ece1214a38e, --accessToken, ????????, --clientId, MjY1ZTFiNjQtYTA3Ny00ZTRiLWFhOWQtNzY1MTBkODMwYWYy, --xuid, 2535431475640334, --userType, msa, --versionType, release, --launchTarget, forgeclient, --fml.forgeVersion, 38.0.17, --fml.mcVersion, 1.18, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20211130.085255]
21:22:14.300
[21:22:14] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 9.0.7+91+master.8569cdf starting: java version 17.0.1 by Microsoft
21:22:14.441
[21:22:14] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.5 Source=union:/C:/Users/Ben/AppData/Roaming/.minecraft/libraries/org/spongepowered/mixin/0.8.5/mixin-0.8.5.jar%2319! Service=ModLauncher Env=CLIENT
21:22:16.240
[21:22:16] [main/INFO] [cp.mo.mo.LaunchServiceHandler/MODLAUNCHER]: Launching target 'forgeclient' with arguments [--version, 1.18-forge-38.0.17, --gameDir, C:\Users\Ben\AppData\Roaming\.minecraft, --assetsDir, C:\Users\Ben\AppData\Roaming\.minecraft\assets, --uuid, e1c40e5b9d384cb0b8589ece1214a38e, --username, cringyboiiiiiii, --assetIndex, 1.18, --accessToken, ????????, --clientId, MjY1ZTFiNjQtYTA3Ny00ZTRiLWFhOWQtNzY1MTBkODMwYWYy, --xuid, 2535431475640334, --userType, msa, --versionType, release]
21:22:16.414
[21:22:16] [main/WARN] [mixin/]: Error loading class: net/minecraft/world/biome/BiomeGenerationSettings$Builder (java.lang.ClassNotFoundException: net.minecraft.world.biome.BiomeGenerationSettings$Builder)