Problemas ao compilar

Boa tarde galera.

Precisei criar um novo projeto em separado da minha aplicação.
Quando copiei a pasta de imagens, javaScripts… Começou a dar este erro… e não compila…

Alguém já viu?

Internal validation error java.lang.NullPointerException at org.eclipse.wst.jsdt.internal.compiler.lookup.CompilationUnitBinding.sourceMethod(CompilationUnitBinding.java:83) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.MethodBinding.sourceMethod(MethodBinding.java:553) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.SourceTypeBinding.resolveTypesFor(SourceTypeBinding.java:1068) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.SourceTypeBinding.resolveTypesFor(SourceTypeBinding.java:1054) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.SourceTypeBinding.methods(SourceTypeBinding.java:779) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.MethodBinding.ensureBindingsAreComplete(MethodBinding.java:623) at org.eclipse.wst.jsdt.internal.compiler.lookup.Scope.findMethod(Scope.java:638) 
 at org.eclipse.wst.jsdt.internal.compiler.lookup.Scope.getImplicitMethod(Scope.java:1635) at org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:325) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.FieldReference.resolveType(FieldReference.java:346) at org.eclipse.wst.jsdt.internal.compiler.ast.FieldReference.resolveType(FieldReference.java:275) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:279) at org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:267) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:267) at org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:267) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.ReturnStatement.resolve(ReturnStatement.java:146) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:350) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:137) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:304) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:375) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.FunctionExpression.resolveType(FunctionExpression.java:58) at org.eclipse.wst.jsdt.internal.compiler.ast.Assignment.resolveType(Assignment.java:160) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.Expression.resolve(Expression.java:477) at org.eclipse.wst.jsdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:
 394) at org.eclipse.wst.jsdt.internal.compiler.Compiler.process(Compiler.java:604) at org.eclipse.wst.jsdt.internal.compiler.Compiler.compile(Compiler.java:356) at 
 org.eclipse.wst.jsdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:288) at 
 org.eclipse.wst.jsdt.internal.core.builder.BatchImageBuilder.compile(BatchImageBuilder.java:86) at org.eclipse.wst.jsdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:
 227) at org.eclipse.wst.jsdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:58) at org.eclipse.wst.jsdt.internal.core.builder.JavaBuilder.buildAll(JavaBuilder.java:291) at 
 org.eclipse.wst.jsdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:194) at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728) at 
 org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199) at 
 org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239) at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292) at 
 org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295) at 
 org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351) at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374) at 
 org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:513) at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:422) at 
 org.eclipse.ui.actions.GlobalBuildAction$1.run(GlobalBuildAction.java:180) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)