Data Gateway Disappeared After Took Over Dataset Setting

Hello everyone,

I downloaded a PBIX file from the orgization Workspace, edited it and re-published it. Everything works alright at this moment, and dataset refreshes normally. My colleague who has the control of the dataset can see the gateway under the dataset setting, and there is no user name or password needed for the server. After I took over the dataset setting, scheduled refresh failed and I cannot see the data gateway under "Gateway Connection". Is there anything I can do on my side? Thank you.