Hello @astonishing-answer-96712, thank you for your response! We have already solved our problem. Apparently, the problem was in the version of elastic search. Our DataHub version is 0.8.44, and when we tried to send a request to datahub-gms, we couldn't process that request, and logs was showing "NullPointerException". Therefore, we decided to downgrade our version of elastic search from 8.4.1 to 7.17.7 and it worked.