Qualtrics API returns inconsistent 500 errors

Hi All, While running calls to update contacts in mailing list and creating survey response exports I'm getting 500 -Internal Server Error but this is inconsistent. The code itself is fine due to the inconsistent nature I believe that the problem is on the Qualtrics api side. I also have function that sends the call again on 500 errors, but sometimes the next attempt will work while other times I will get a repeated 500 error. The exact error code is: "RTC'b'_1" Any help regarding this issue will be appreciated. Thanks,