A big file. It might be just too much for Gimp 
but since it opens in everything else.
I can take a 30 MB psd (8 bit RGB) which opens ok in Gimp. Using Krita and convert that to CMYK and 32 bit, gives a file size 92 MB
..and that stalls in Gimp 2.10.30 / kubuntu 18.04
What do the properties say in Krita ?
Otherwise, post a bug report for the developers giving all details of the PSD file and your installation: https://gitlab.gnome.org/GNOME/gimp/-/issues
...and if possible a link to that problem psd file. (dropbox or similar)
but since it opens in everything else.I can take a 30 MB psd (8 bit RGB) which opens ok in Gimp. Using Krita and convert that to CMYK and 32 bit, gives a file size 92 MB
..and that stalls in Gimp 2.10.30 / kubuntu 18.04
What do the properties say in Krita ?
Otherwise, post a bug report for the developers giving all details of the PSD file and your installation: https://gitlab.gnome.org/GNOME/gimp/-/issues
...and if possible a link to that problem psd file. (dropbox or similar)