Bing API exception: The formatter threw an exception while trying to deserialize the message

I am requesting compaign data via bing api using Python SDK, and this line of code throws a suds.WebFault error

get_keyword_ideas_response = adinsight_service.GetAuctionInsightData(EntityType ='Campaign',EntityIds =entityIds, SearchParameters=search_parameters)

the EntityIds is np.array of accounts. and the search parameters are

(ArrayOfSearchParameter){
   SearchParameter[] = 
      
      (DateRangeSearchParameter){
         EndDate = 
            (DayMonthAndYear){
               Day = 30
               Month = 8
               Year = 2022
            }
         StartDate = 
            (DayMonthAndYear){
               Day = 1
               Month = 8
               Year = 2022
            }
      },
      (AuctionSegmentSearchParameter){
         Segment = "Week"
      },,
 }

the full message of exception is : suds.WebFault: Server raised fault: 'The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter https://bingads.microsoft.com/AdInsight/v13:EntityIds. The InnerException message was 'Error in line 6 position 51. Expecting state 'Element'.. Encountered 'Text' with name '', namespace ''. '. Please see InnerException for more details.'