So I'm trying to mod minecraft 1.15.2 and but I can't seem to run the gradle build as it can't find the RAM to initialise the JVM. I played around with the gradle.properties file and it can only start when I allocate 1.2GB or lower despite having 9GB free of 16GB. I am 99% percent sure I successfully switched over to the 64bit jdk1.8.0._261 so I really don't know what could be causing the issue. I've attached screenshots of my user path, system path, aand the error message.
here's the result of for java -version
C:\dev\minecraft\Forge Test>java -version
java version "1.8.0_261"