errors thrown by the IDE

[SaharMehrpour]

java.lang.UnsupportedOperationException: JsonNull
at com.google.gson.JsonElement.getAsString(JsonElement.java:192)
at FileChangeManager.lambda$processReceivedMessages$0(FileChangeManager.java:249)
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:878)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:827)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:466)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:704)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:465)
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)

[SaharMehrpour]

java.lang.Throwable: Write-unsafe context! Model changes are allowed from write-safe contexts only. Please ensure you're using invokeLater/invokeAndWait with a correct modality state (not "any"). See TransactionGuard documentation for details.
current modality=ModalityState.NON_MODAL
known modalities:
ModalityState.NON_MODAL, writingAllowed=true;
ModalityState:{}, writingAllowed=true
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:145)
at com.intellij.openapi.application.TransactionGuardImpl.assertWriteActionAllowed(TransactionGuardImpl.java:229)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl4Edt(FileEditorManagerImpl.java:862)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.lambda$openFileImpl4$7(FileEditorManagerImpl.java:845)
at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:630)
at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:643)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl4(FileEditorManagerImpl.java:845)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl3(FileEditorManagerImpl.java:790)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.lambda$openFileImpl2$4(FileEditorManagerImpl.java:773)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:220)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:178)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:168)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:154)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl2(FileEditorManagerImpl.java:773)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileWithProviders(FileEditorManagerImpl.java:704)
at com.intellij.openapi.fileEditor.ex.FileEditorManagerEx.openFile(FileEditorManagerEx.java:139)
at FileChangeManager.lambda$processReceivedMessages$0(FileChangeManager.java:253)
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:878)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:827)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:466)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:704)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:465)
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)