[Access] ws controller error handling

Makefile

@@ -216,7 +216,6 @@ generate-mocks: install-mock-generators
 	mockery --name 'Storage' --dir=module/executiondatasync/tracker --case=underscore --output="module/executiondatasync/tracker/mock" --outpkg="mocktracker"
 	mockery --name 'ScriptExecutor' --dir=module/execution --case=underscore --output="module/execution/mock" --outpkg="mock"
 	mockery --name 'StorageSnapshot' --dir=fvm/storage/snapshot --case=underscore --output="fvm/storage/snapshot/mock" --outpkg="mock"
-	mockery --name 'WebsocketConnection' --dir=engine/access/rest/websockets --case=underscore --output="engine/access/rest/websockets/mock" --outpkg="mock"
 
 	#temporarily make insecure/ a non-module to allow mockery to create mocks
 	mv insecure/go.mod insecure/go2.mod