Thank you for your reply! I completely forgot to re-name the file inside the sys file for the WiFi Server, previously, so it never managed to install it at all.
I have reset the board once more and performed the M997 S0:1:2 for the complete reinstall.
I'm currently trying to load the web server, but it's taking a long while to load up. Once it's fully loaded up, I'll have a check on its connection reliability, so you're also up-to-date with the information. I hope this does
Is it normal for the Duet Web Server to take ages to load upon first boot? Everytime I do M552 S0 and S1 now, it times out while trying to connect, unless I've done S1 twice.
[EDIT]
Ok, I found out why my web server was taking ages... It was because my phone was updating apps in the background, hindering the local tether bandwidth. I've disabled it now, and the web server loaded instantly - so at least that's sorted.
[EDIT 2]
So far, no disconnections have happened. It's been connected for nearly 10 minutes now, which broke it's old record of an uptime of 30 seconds, so good news as of now. I will create an Edit 3 once I have further analysis.
[EDIT 3]
It's been connected for over 30 minutes now! That's done the charm! Now it's time to sort out the configs for the printer, then I will work out on how to connect it to our office WiFi.