csshX not working in Ventura

I upgraded to Ventura this weekend, and now csshX won't run. I get the error messages

Unimplemented: POSIX::tmpnam(): use File::Temp instead at /System/Library/Perl/5.30/darwin-thread-multi-2level/POSIX.pm line 185.
Unimplemented: POSIX::tmpnam() at /Users/barmar/bin/csshX line 1130.
BEGIN failed--compilation aborted at /Users/barmar/bin/csshX line 1130.

I don't think the solutions at csshX not working on Mac OS Big Sur will work because perl5.18 doesn't exist any more. The only versions of perl are 5.30 and 5.34.