External Jar Libraries give error on compile

[Verdanix]

So I added a 3rd party jar library and when I compile, it gives an error. I am making Minecraft Bedrock Plugins so I really need that.

jar://C:/Users/Deser/Downloads/FormConstructor.jar!/ru/contentforge/formconstructor/FormConstructor.class

com.intellij.diagnostic.PluginException: stub:[PsiMethod:FormConstructor, PsiMethod:onEnable, PsiMethod:onFormResponded]; mirror:[PsiMethod:onEnable, PsiMethod:onFormResponded] [Plugin: jd-intellij]
at com.intellij.psi.impl.compiled.ClsFileImpl.wrapException(ClsFileImpl.java:387)
at com.intellij.psi.impl.compiled.ClsFileImpl.getMirror(ClsFileImpl.java:355)
at com.intellij.psi.impl.compiled.ClsElementImpl.getMirror(ClsElementImpl.java:140)
at com.intellij.psi.impl.compiled.ClsElementImpl.getTextOffset(ClsElementImpl.java:177)
at com.intellij.ide.util.EditSourceUtil.getDescriptor(EditSourceUtil.java:41)
at com.intellij.ide.util.PsiNavigationSupportImpl.getDescriptor(PsiNavigationSupportImpl.java:31)
at com.intellij.psi.impl.PsiElementBase.navigate(PsiElementBase.java:194)
at com.intellij.codeInsight.navigation.NavigationUtil.lambda$openFileWithPsiElement$2(NavigationUtil.java:178)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:216)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:172)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:162)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:148)
at com.intellij.codeInsight.navigation.NavigationUtil.openFileWithPsiElement(NavigationUtil.java:171)
at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.navigate(AbstractPsiBasedNode.java:235)
at com.intellij.util.OpenSourceUtil.navigateToSource(OpenSourceUtil.java:116)
at com.intellij.ui.AutoScrollToSourceHandler.lambda$scrollToSource$2(AutoScrollToSourceHandler.java:184)
at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:218)
at com.intellij.openapi.application.TransactionGuardImpl.access$200(TransactionGuardImpl.java:21)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:200)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:781)
at com.intellij.openapi.application.impl.ApplicationImpl.lambda$invokeLater$4(ApplicationImpl.java:319)
at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:84)
at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:133)
at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:46)
at com.intellij.openapi.application.impl.FlushQueue$FlushNow.run(FlushQueue.java:189)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:969)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:839)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:449)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:808)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:448)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:781)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:496)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: com.intellij.psi.impl.compiled.ClsElementImpl$InvalidMirrorException: stub:[PsiMethod:FormConstructor, PsiMethod:onEnable, PsiMethod:onFormResponded]; mirror:[PsiMethod:onEnable, PsiMethod:onFormResponded]
at com.intellij.psi.impl.compiled.ClsElementImpl.setMirrors(ClsElementImpl.java:274)
at com.intellij.psi.impl.compiled.ClsClassImpl.setMirror(ClsClassImpl.java:451)
at com.intellij.psi.impl.compiled.ClsElementImpl.setMirror(ClsElementImpl.java:256)
at com.intellij.psi.impl.compiled.ClsElementImpl.setMirrors(ClsElementImpl.java:277)
at com.intellij.psi.impl.compiled.ClsElementImpl.setMirrors(ClsElementImpl.java:269)
at com.intellij.psi.impl.compiled.ClsFileImpl.setFileMirror(ClsFileImpl.java:300)
at com.intellij.psi.impl.compiled.ClsFileImpl.lambda$getMirror$1(ClsFileImpl.java:350)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:688)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:634)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:64)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeNonCancelableSection(CoreProgressManager.java:218)
at com.intellij.psi.impl.compiled.ClsFileImpl.getMirror(ClsFileImpl.java:349)
... 43 more