I have the same problem after updating to 21.04. The error is:
usrmerge (24ubuntu3)...
FATAL ERROR:
Both /bin/ksh and /usr/bin/ksh exist.
Sub-process /usr/bin/dpkg returned an error code (1)
$ sudo /usr/lib/usrmerge/convert-usrmerge
FATAL ERROR:
Both /bin/ksh and /usr/bin/ksh exist.
You can try correcting the errors reported and running again
/usr/lib/usrmerge/convert-usrmerge until it will complete without errors.
Do not install or update other Debian packages until the program
has been run successfully.
I have the same problem after updating to 21.04. The error is:
usrmerge (24ubuntu3)...
FATAL ERROR:
Both /bin/ksh and /usr/bin/ksh exist.
Sub-process /usr/bin/dpkg returned an error code (1)
$ sudo /usr/lib/ usrmerge/ convert- usrmerge
FATAL ERROR:
Both /bin/ksh and /usr/bin/ksh exist.
You can try correcting the errors reported and running again usrmerge/ convert- usrmerge until it will complete without errors.
/usr/lib/
Do not install or update other Debian packages until the program
has been run successfully.