gradle dont work java 16

[Euphillya]

Describe the bug
Impossible compile with java 16

To Reproduce
Use jdk 16

Screenshots or Videos
java.lang.IllegalAccessError: class org.gradle.internal.compiler.java.ClassNameCollector

[TheDGOfficial]

Not a Purpur problem. See gradle/gradle#13481 . To resolve it, you have four common options: 1) Use JDK 15 for running Gradle but fork the compiler to use/target JDK 16, 2) Use Gradle 7.0 milestone/RC versions, 3) Just use and target Java 15 or 11, 4) Add all required —add-opens directives (or —illegal-access=permit)

[jpenilla]

Not a Purpur issue. See the comment from @TheDGOfficial.