Comment 2 for bug 1945687

Hi vivek,

Does it work if you do:

$ sudo mkdir -p /var/run/php/
$ sudo systemctl restart php7.4-fpm

I notice your /run directory is mounted as a temp filesystem, which should work but might be involved in whatever's gone wrong:
tmpfs 1218676 3820 1214856 1% /run

Fwiw, on my 20.04 system I have:

$ ls -l /var/run
lrwxrwxrwx 1 root root 4 Dec 17 2019 /var/run -> /run/
$ ls -ld /run
drwxr-xr-x 48 root root 1680 Oct 1 06:33 /run/

Can you check and see if your /run and /var/run are configured correctly, and see if creating the /var/run/php directory resolves the installation problem?

I spotted this stackoverflow question that seems to match what you're seeing:
https://stackoverflow.com/questions/65841710/installing-php-on-debian-returns-an-error-code