Unable to see Users managing page : Internal Error (Invalid syntax..)

{"time": 1643125196.0587938, "os": "Ubuntu 18.04.6 LTS", "version": "2.0.0p18", "edition": "cre", "core": "nagios", "python_version": "3.8.7 (default, Feb  3 2021, 02:50:03) \n[GCC 10.1.0]", "python_paths": ["\/omd\/sites\/monitoring\/local\/lib\/python3", "\/omd\/sites\/monitoring\/lib\/python38.zip", "\/omd\/sites\/monitoring\/lib\/python3.8", "\/omd\/sites\/monitoring\/lib\/python3.8\/lib-dynload", "\/omd\/sites\/monitoring\/lib\/python3.8\/site-packages", "\/omd\/sites\/monitoring\/lib\/python3"], "id": "0c0845f4-7df5-11ec-8960-000c29e52fe4", "crash_type": "gui", "exc_type": "SyntaxError", "exc_value": "('invalid syntax', ('<unknown>', 1, 1, '<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\\n'))", "exc_traceback": [["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/wsgi\/applications\/checkmk.py", 165, "_process_request", "response = page_handler()"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/wsgi\/applications\/utils.py", 59, "_call_auth", "func()"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/pages.py", 186, "<lambda>", "return (lambda hc: lambda: hc().handle_page())(handle_class)"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/pages.py", 48, "handle_page", "self.page()"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/pages.py", 158, "<lambda>", "\"page\": lambda self: self._wrapped_callable[0]()"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/wato\/page_handler.py", 92, "page_handler", "_wato_page_handler(current_mode, mode_permissions, mode_class)"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/wato\/page_handler.py", 101, "_wato_page_handler", "mode = mode_class()"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/wato\/pages\/users.py", 95, "__init__", "self._job_snapshot = userdb.UserSyncBackgroundJob().get_status_snapshot()"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/gui_background_job.py", 210, "get_status_snapshot", "return GUIBackgroundStatusSnapshot(self)"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/gui_background_job.py", 250, "__init__", "self._job_status = job.get_status()"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/background_job.py", 430, "get_status", "status = self._jobstatus.get_status_from_file()"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/gui\/background_job.py", 558, "get_status_from_file", "data = store.load_object_from_file(str(self._jobstatus_path), default={}, lock=True)"], ["\/omd\/sites\/monitoring\/lib\/python3\/cmk\/utils\/store.py", 204, "load_object_from_file", "return ast.literal_eval(content)"], ["\/omd\/sites\/monitoring\/lib\/python3.8\/ast.py", 59, "literal_eval", "node_or_string = parse(node_or_string, mode='eval')"], ["\/omd\/sites\/monitoring\/lib\/python3.8\/ast.py", 47, "parse", "return compile(source, filename, mode, flags,"]], "local_vars": "eydmZWF0dXJlX3ZlcnNpb24nOiAtMSwKICdmaWxlbmFtZSc6ICc8dW5rbm93bj4nLAogJ2ZsYWdzJzogMTAyNCwKICdtb2RlJzogJ2V2YWwnLAogJ3NvdXJjZSc6ICc8P3htbCB2ZXJzaW9uPSIxLjAiIGVuY29kaW5nPSJVVEYtOCIgc3RhbmRhbG9uZT0ieWVzIj8+XG4nCiAgICAgICAgICAgJzxOQUdJT1M+XG4nCiAgICAgICAgICAgJyAgPERBVEFTT1VSQ0U+XG4nCiAgICAgICAgICAgJyAgICA8VEVNUExBVEU+Y2hlY2tfbWsta2VybmVsPC9URU1QTEFURT5cbicKICAgICAgICAgICAnICAgICcKICAgICAgICAgICAnPFJSREZJTEU+L29tZC9zaXRlcy9tb25pdG9yaW5nL3Zhci9wbnA0bmFnaW9zL3BlcmZkYXRhL0ZLLUJJVFdBUkRFTi0xL0tlcm5lbF9NYWpvcl9QYWdlX0ZhdWx0c19wZ21hamZhdWx0LnJyZDwvUlJERklMRT5cbicKICAgICAgICAgICAnICAgIDxSUkRfU1RPUkFHRV9UWVBFPk1VTFRJUExFPC9SUkRfU1RPUkFHRV9UWVBFPlxuJwogICAgICAgICAgICcgICAgPFJSRF9IRUFSVEJFQVQ+ODQ2MDwvUlJEX0hFQVJUQkVBVD5cbicKICAgICAgICAgICAnICAgJywKICd0eXBlX2NvbW1lbnRzJzogRmFsc2V9", "details": {"page": "wato.py", "vars": {"mode": "users"}, "username": null, "user_agent": "Mozilla\/5.0 (Windows NT 10.0; Win64; x64; rv:96.0) Gecko\/20100101 Firefox\/96.0", "referer": "https:\/\/checkmk.xxxxxxx.com\/monitoring\/check_mk\/index.py?start_url=%2Fmonitoring%2Fcheck_mk%2Fdashboard.py", "is_mobile": false, "is_ssl_request": true, "language": "de", "request_method": "GET"}}