Then I'd suggest trying a new cable and USB-port on your computer.
Or try a new mirror, as your file(s) might be corrupted.
Downloaded the one I flashed yesterday from https://sourceforge.net/projects/stagos-12/files/13/panther/StagOS-panther-13.0-OFFICIAL-GApps-20230118-1029-updatepackage.zip/download?use_mirror=nav&use_mirror=nav&r=https://forum.xda-developers.com/#
(The Sweden-mirror on SF).
Its the exact same build as I flashed a week ago, and the same build as I flashed the 20th.
It was however a hassle the 20th since they had no mirrors on SF.
But still the same file(s).
Unless a new version was uploaded late on the 30th, but I highly doubt that, as there is no information regarding any updated ROMs since the 28th of January, which was AICP.