Error while saving the report from desktop to report server, but upload works fine.

Hi,

I was able to upload the report from PB Report server,

but when I try to save or overwrite the report from desktop to server(I'm using the same version as report server March 2018) it throws an error 

saying "An error occured while attempting to save the report to Power BI report server".

can any one of you please help me on this.

Thanks,

Sumanth