Handle global context errors (i.e. with no callback id)

pyppeteer/connection.py

@@ -261,6 +261,14 @@ def _on_message(self, msg: str) -> None:  # noqa: C901
                     result = obj.get('result')
                     if callback and not callback.done():
                         callback.set_result(result)
+        elif obj.get('error'):
+            for callback in self._callbacks.values():
+                callback.set_exception(_createProtocolError(
+                    callback.error,  # type: ignore
+                    callback.method,  # type: ignore
+                    obj,
+                ))
+            self._callbacks = {}
         else:
             params = obj.get('params', {})
             if obj.get('method') == 'Target.receivedMessageFromTarget':