add asm8 but I bet it will conflict with asm4 which is being included with mc I think, for some reason

build.gradle

@@ -42,6 +42,13 @@ dependencies {
 	implementation 'com.google.guava:guava:28.0-jre'
 	implementation group: 'com.google.code.gson', name: 'gson', version: '2.8.6'
 
+	// mixin and fabric loader need asm 8
+	implementation 'org.ow2.asm:asm:8.0'
+	implementation 'org.ow2.asm:asm-analysis:8.0'
+	implementation 'org.ow2.asm:asm-commons:8.0'
+	implementation 'org.ow2.asm:asm-tree:8.0'
+	implementation 'org.ow2.asm:asm-util:8.0'
+
 	//to change the versions see the gradle.properties file
 	minecraft "com.mojang:minecraft:${project.minecraft_version}"