I am getting the same error while calling the RenderReport in Microsoft Flow. However it is retrieving all the reports in the system while testing the custom connector's "_GET_Reports" function. about xrm.reportscheduler

[glisp42]

Just a heads up for anyone else who's having this issue. I was having the same thing and it turned out to be multifactor authentication being enabled. Make sure the user (ideally a service account) is a Global Admin and has multifactor authentication disabled.

[bguidinger]

@glisp42 you are correct that MFA has to be disabled for the service account. However, the user does not need to be a Global Administrator.

[theapemother]

@bguidinger @glisp42 By service account do you mean one that is set up from azure to make the custom connector? Is it possible to create a separate account that doesn't have global admin and disabled MFA to assign to this plugin so that the flow runs as wanted?