error while loading shared libraries: libncurses.so.5: wrong ELF class: ELFCLASS64

This error message indicates that the program you are trying to run is looking for a 32-bit version of the libncurses library, but your system has only the 64-bit version installed.

To resolve this issue, you can try installing the 32-bit version of the libncurses library using your package manager. For example, on Ubuntu, you can run the following command:

sudo apt-get install libncurses5:i386

If your system does not have the 32-bit version of the library available, you may need to compile and install it from source.

Alternatively, you can try running the program in a 64-bit compatibility mode by running the following command:

linux32 <program_name>

This will set up a 32-bit environment for the program to run in, allowing it to use the 64-bit version of the library.