Mapped Network drives not appearing

Hi all,

Just came back off furlough and needed to update some static data in the PBIX for VAT and TOMs rates, but to do so it needs to refresh connection to a file stored on a shared network location (M DRIVE). When i tried to refresh it says the connection is not there. I have then manually gone to look within the desktop and the M drive is not showing as an acceptable location.

I have tried recreating it, but it is not showing it as visible at all. Have i missed a change? The gateway is still working and refreshing for this report.

I did recently have to install x64 new version of desktop, the machine is x64, could this be the issue? Should i reinstall as x32? Or is there something more fundimatal here doing on?

FYI this has work for 2 yrs and 8 months, but as of 2021 and today with the new install of desktop it is not. But it would not let me open the PBIX without installing a newer version. The PBIX is downloaded from online today also.

Thanks