I followed that guide and it still does not work.
I added the following to the fstab.
//192.168.77.104/Shared\040Media /mnt/Media cifs credentials=/root/.smbcredentials_auto,uid=1000,gid=1000 0 0
I seem to remember having a similar issue with the PI because it was trying to mount network shares before making the wifi connection.
I'm going to boot up the PI4 and have a look at the fstab there, maybe I had to add something. Nope, I see nothing there but I'm betting this is the issue.
I know there's a way to make the system wait for the wifi to connect during boot, but I forgot how. I'm going to create a new post for this question.