QCommand API response issues

Hi, I have a strange issue, I use same call for two different commcells. One commcell returns data as requested with no issues, second commcell simply returns very ‘informative’ error:

Response code: <Response [200]>
{'CVGui_GenericResp': {'@errorMessage': 'Operation failed', '@errorCode': '2'}}

I am sending the following URL:

http://mycommcell.NET:81/SearchSvc/CVWebService.svc/ExecuteQCommandcommand=qoperation execscript -sn QS_DataProtectionJobSummary -si '2020-1-1' -si '2021-3-16'

Code snippet:

 

    def commcell_authentication(self):
        """This method is used to get token for comcells"""

        for auth in self.cs_api:
            pwd = self.cs_creds['password']
            pwd = bytes(pwd, encoding='utf8')
            pwd = str(base64.b64encode(pwd), encoding='utf-8')
            username = 'dbadmin\\' + self.cs_creds['username']
            self.cs_login_api = self.cs_login_api.replace("<<username>>", username)
            self.cs_login_api = self.cs_login_api.replace("<<password>>", pwd)

            response = requests.post(auth['url'] + 'Login', data = self.cs_login_api)
            if response.status_code == 200:
                root = ET.fromstring(response.text)
                token = root.attrib['token']
                headers = {'Accept': 'application/json', 'Authtoken': token, 'Content-Type': 'application/x-www-form-urlencoded'}
            auth['headers'] = headers


    def get_commvault_clients(self):
        """This method is used to get history of all clients backups from past year, in both comcells"""

        todays_date = datetime.datetime.today()
        todays_date = "{}-{}-{}".format(todays_date.year, todays_date.month, todays_date.day)
        last_year_date = datetime.datetime.today() - datetime.timedelta(days = 365)
        last_year_date = "{}-1-1".format(last_year_date.year)

        self.commvault_servers = []
        for api in self.cs_api:
            jobs_request = api['url'] + 'ExecuteQCommand'
            jobs_response = requests.post(jobs_request, headers = api['headers'], data = "command=qoperation execscript -sn QS_DataProtectionJobSummary -si " + "'" + str(last_year_date) + "'" + " -si " + "'" +str(todays_date) + "'") 
            if jobs_response.status_code == 200:
                jobs = jobs_response.json()
                for job in jobs['ExecScriptOutput']['FieldValue']:
                    self.commvault_servers.append(job)

        return self.commvault_servers

Where is the problem and what does the error code ‘2’ means?