Need help fixing a mixin error

Hi there! I recently installed two plugins, to help me implement a sort of forest biome to the end, with new wood, structures, mobs, so on. but ever since installing Forge mixins support, a dependency for the End biomes plugin, but whenever I try to playtest, I get the following error

Executing Gradle task: runClient
Build info: MCreator 2024.4.52410, forge-1.20.1, 64-bit, 32676 MB, Windows 11, JVM 21.0.4, JAVA_HOME: E:\Program Files\Pylo\MCreator\jdk, started on: 2025-02-19-19:33:11
Loaded APIs: pehkui, tetra_libs, serene_seasons, kotlin, patchouli, geckolib, oculus, passive_skill_tree, jei

FAILURE: Build failed with an exception.
* Where:
Build file 'E:\Mcreator\Test\build.gradle' line: 3
* What went wrong:
An exception occurred applying plugin request [id: 'org.spongepowered.mixin', version: '0.7.+']
> Failed to apply plugin 'org.spongepowered.mixin'.
> Could not find property 'minecraft', or 'patcher' on root project 'Test', ensure ForgeGradle is applied.
* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
BUILD FAILED in 684ms

BUILD FAILED
Task completed in less than a second

My build.gradle file looks like this

plugins {
    id 'eclipse'
    id 'org.spongepowered.mixin' version '0.7.+'
    id 'net.minecraftforge.gradle' version '[6.0.16,6.2)'
}

version = '1.0'
group = 'com.otterlyomari.fantasy_reinvented'
archivesBaseName = 'fantasy_reinvented'

java.toolchain.languageVersion = JavaLanguageVersion.of(17)

minecraft {
    mappings channel: 'official', version: '1.20.1'

    accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')

    copyIdeResources = true

    runs {
        client {
            def mcreatorJvmOptions = System.getenv('MCREATOR_JVM_OPTIONS')
            if (mcreatorJvmOptions) {
                jvmArgs += mcreatorJvmOptions.split("\\s+").findAll { it.trim() }.toList()
            }

            property 'mixin.env.remapRefMap', 'true'
            property 'mixin.env.refMapRemappingFile', '${projectDir}/build/createSrgToMcp/output.srg'
        }

        server {
        }

        configureEach {
            workingDirectory project.file('run')

            property 'forge.logging.markers', 'REGISTRIES'
            property 'forge.logging.console.level', 'debug'

            mods {
                examplemod {
                    source sourceSets.main
                }
            }
        }
    }
}

dependencies {
    minecraft 'net.minecraftforge:forge:1.20.1-47.3.0'
    annotationProcessor 'org.spongepowered:mixin:0.8.5:processor'
}

mixin {
    add sourceSets.main, 'mixins.fantasy_reivented.refmap.json'

    config 'mixins.fantasy_reivented.json'

    debug.verbose = true
    debug.export = true
    dumpTargetOnFailure = true

    quiet
}

tasks.withType(JavaCompile).configureEach {
    options.encoding = 'UTF-8' // Use the UTF-8 charset for Java compilation
}

apply from: 'mcreator.gradle'

What I've tried:

running gradle commands in Command Prompt to refresh dependencies, clear gradle cache, and rebuild

Deleting the Biome and End Biome elements

Any help is appreciated, thank you