I can confirm this issue with the same terminal output:
[FATAL 11:26:44.925064] AppInfoView.vala:312: The following packages have unmet dependencies: gimp-normalmap: Conflicts: gimp-plugin-registry but 7.20140602ubuntu2 is to be installed gimp-ufraw: Conflicts: gimp-dcraw but 1.31-1.1 is to be installed
I can confirm this issue with the same terminal output:
[FATAL 11:26:44.925064] AppInfoView. vala:312: The following packages have unmet dependencies: gimp-normalmap: Conflicts: gimp-plugin- registry but 7.20140602ubuntu2 is to be installed gimp-ufraw: Conflicts: gimp-dcraw but 1.31-1.1 is to be installed
apt install gimp executes without issue