A DESCRIPTION OF THE PROBLEM :
Working on completing GUI assignment for school and suddenly had compiler problems.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compiler error now happens even with older java programs that never had issues before. Happened since last update today.

ACTUAL -
Information:java: An exception has occurred in the compiler (14.0.1). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program, the following diagnostic, and the parameters passed to the Java compiler in your report. Thank you.
Information:java: java.lang.ClassFormatError: Illegal UTF8 string in constant pool in class file com/sun/tools/javac/code/Type$ClassType$2
Information:java: at java.base/java.lang.ClassLoader.defineClass2(Native Method)
Information:java: at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1109)
Information:java: at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:183)
Information:java: at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:780)
Information:java: at java.base/jdk.internal.loader.BuiltinClassLoader.findClassInModuleOrNull(BuiltinClassLoader.java:701)
Information:java: at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:626)
Information:java: at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:600)
Information:java: at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
Information:java: at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
Information:java: at jdk.compiler/com.sun.tools.javac.code.Symbol$ClassSymbol.<init>(Symbol.java:1289)
Information:java: at jdk.compiler/com.sun.tools.javac.code.Symbol$ModuleSymbol.create(Symbol.java:983)
Information:java: at jdk.compiler/com.sun.tools.javac.code.Symtab.enterModule(Symtab.java:805)
Information:java: at jdk.compiler/com.sun.tools.javac.code.Symtab$3.<init>(Symtab.java:401)
Information:java: at jdk.compiler/com.sun.tools.javac.code.Symtab.<init>(Symtab.java:395)
Information:java: at jdk.compiler/com.sun.tools.javac.code.Symtab.instance(Symtab.java:91)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Attr.<init>(Attr.java:136)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Attr.instance(Attr.java:127)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Annotate.<init>(Annotate.java:109)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Annotate.instance(Annotate.java:84)
Information:java: at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.<init>(ClassReader.java:253)
Information:java: at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.instance(ClassReader.java:246)
Information:java: at jdk.compiler/com.sun.tools.javac.code.ClassFinder.<init>(ClassFinder.java:185)
Information:java: at jdk.compiler/com.sun.tools.javac.code.ClassFinder.instance(ClassFinder.java:178)
Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.<init>(JavaCompiler.java:392)
Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.instance(JavaCompiler.java:115)
Information:java: at jdk.compiler/com.sun.tools.javac.processing.JavacProcessingEnvironment.<init>(JavacProcessingEnvironment.java:215)
Information:java: at jdk.compiler/com.sun.tools.javac.processing.JavacProcessingEnvironment.instance(JavacProcessingEnvironment.java:200)
Information:java: at jdk.compiler/com.sun.tools.javac.api.BasicJavacTask.initPlugins(BasicJavacTask.java:216)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.prepareCompiler(JavacTaskImpl.java:199)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0(JavacTaskImpl.java:101)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.handleExceptions(JavacTaskImpl.java:147)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:100)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:94)
Information:java: at org.jetbrains.jps.javac.JavacMain.compile(JavacMain.java:207)
Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.compileJava(JavaBuilder.java:493)
Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.compile(JavaBuilder.java:345)
Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.doBuild(JavaBuilder.java:270)
Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.build(JavaBuilder.java:223)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:1414)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:1092)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:1159)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:1053)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:882)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:449)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:190)
Information:java: at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:138)
Information:java: at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:297)
Information:java: at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:130)
Information:java: at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:218)
Information:java: at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
Information:java: at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
Information:java: at java.base/java.lang.Thread.run(Thread.java:832)
Information:java: Errors occurred while compiling module 'Assignment 5 GUI'
Information:javac 14.0.1 was used to compile java sources
Information:2020-07-14 12:42 a.m. - Build completed with 1 error and 0 warnings in 2 s
Error:java: Compilation failed: internal java compiler error

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.text.Font;
import javafx.event.ActionEvent;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;
import java.util.Random;


public class MainMathGUI extends Application {
    // TODO: Instance Variables for View Components and Model
    TextField name, userAnswer;
    Label labelA, labelC, labelW, labelQuiz;
    Button submit;

    public int numRight = 0;
    public int numWrong = 0;

    Random randA = new Random();
    Random randB = new Random();
    int x = randA.nextInt(12) + 1;
    int y = randB.nextInt(12) + 1;

    // TODO: Private Event Handlers and Helper Methods
    //private void myHandler(ActionEvent e) {
    // String msg = "";
    //int n = Integer.parseInt(numFieldC.getText());
    // for (int i = 0; i < n; i++) {
    // msg += "Hello, " + name.getText() + "! ";
    // }
    // labela.setText(msg);


    public void calculate(ActionEvent event) {
        /**
         * Create an object.
         */
        MathAB multiply = new MathAB(1, 1);

            multiply.setA(x);
            multiply.setB(y);

            int user = Integer.parseInt(userAnswer.getText());
            multiply.setUserAnswer(user);


            if (multiply.getScore() == true) { numRight++; }

            else {numWrong ++;}

        }



    /**
     * This is where you create your components and the model and add event
     * handlers.
     *
     * @param stage The main stage
     * @throws Exception
     */
    @Override
    public void start(Stage stage) throws Exception {
        Pane root = new Pane();
        Scene scene = new Scene(root, 400, 300); // set the size here
        stage.setTitle("Multiplication Quiz"); // set the window title here
        stage.setScene(scene);

        // TODO: Add your GUI-building code here
        root.setStyle("-fx-background-color: lightblue;");
        // 1. Create the model
        // 2. Create the GUI components
        name = new TextField("Your Name Here");

        userAnswer = new TextField();
        userAnswer.setPrefSize(80,25);
        userAnswer.relocate(250, 165);
        userAnswer.setFont(new Font("Arial", 20));

        submit = new Button("Submit");

        labelA = new Label(" Welcome!");
        labelC = new Label ("Correct: " + numRight);
        labelW = new Label ("Wrong: " + numWrong);
        labelQuiz = new Label ("Question: " + x + " * " + y + " = ");

        // 3. Add components to the root
        root.getChildren().addAll(name,userAnswer,submit,labelA,labelC,labelW,labelQuiz);

        // 4. Configure the components (colors, fonts, size, location)

        labelA.setPrefWidth(600);
        labelA.setFont(new Font("System", 18));
        labelA.setStyle("-fx-background-color: lightblue;-fx-text-fill:darkblue;");

        name.relocate(20,35);

        labelC.relocate(280, 65);
        labelC.setStyle("-fx-text-fill:green;");
        labelC.setFont(new Font("System", 18));
        labelW.relocate(283, 95);
        labelW.setStyle("-fx-text-fill:red;");
        labelW.setFont(new Font("System", 18));

        labelQuiz.relocate(40, 175);
        labelQuiz.setFont(new Font("Arial", 24));

        submit.relocate(325,260);


        // 5. Add Event Handlers and do final setup
        submit.setOnAction(this::calculate);

        // 6. Show the stage
        stage.show();
    }



    /**
     * This is the main method to launch app
     *
     * @param args unused
     */
    public static void main(String[] args) {
        launch(args);
    }
}


public class MathAB {
    private int a;
    private int b;
    private int user;

    public MathAB (int a, int b) {
        this.a = a;
        this.b = b;
    }

    public void setA(int a) {
        this.a = a;
    }


    public void setB(int b) {
        this.b = b;
    }
    
    public void setUserAnswer(int user) {
        this.user = user;
    }

    public boolean getScore() {
        int answer = a * b;
        if (user == answer) //if user's answer is correct
        { return true;

        } else { //if user is wrong
            return false;
        }
    }

    @Override
    public String toString() {
        return "A" + a + " * B " + b + " = ";
    }
}

---------- END SOURCE ----------

FREQUENCY : always