You can try to install wordpress manually by downloading the zip from wordpress.org. This is the only suggestion I can give you since softaculous is not working for you
Softaculous stores some data into your account’s home folder (like the .cpanel, .softaculous, etc. files). Some of those seemed to be corrupted, which is likely what caused Softaculous to crash.
I’ve removed those files from your account now, so Softaculous should be as good as new now (while leaving your websites fully in tact).
Note that any previous installations managed through Softaculous may be gone now. But you should be able to import those into Softaculous again.