I had this problem once.
Same thing. Could not get it to continue the download.
Xbox help was no help. Had me download the Xbox Companion App for some reason.
I had FS2020 installed on my D: drive.
I finally Formatted the D: drive.
Luckily, I had the D: drive backed up.
Restored the D: drive.
Uninstalled FS2020 via Settings, APPs.
Xbox install downloaded the initial 1.3 GB to my C: drive.
Told it to install to my D: drive and FS2020 ran without any problem.
The additional 130GB did not need to be downloaded.