It happens in ArchLinux as well, so I am sure it has nothing to do with the Ubuntu version...
WARNING: Not able to provide 1 puzzles in levels ['hard']
WARNING: Generate more puzzles if you really need this many puzzles!
WARNING: Repeating puzzle for difficulty hard -- generate more puzzles to avoid this.
It happens in ArchLinux as well, so I am sure it has nothing to do with the Ubuntu version...
WARNING: Not able to provide 1 puzzles in levels ['hard']
WARNING: Generate more puzzles if you really need this many puzzles!
WARNING: Repeating puzzle for difficulty hard -- generate more puzzles to avoid this.