Custom Write Panels not saving to database

Hello,

I’ve created a custom post type and a custom write panel to go along with it. I followed the example here: https://www.sitepoint.com/blogs/2010/08/26/guide-to-wordpress-custom-write-panels/

The problem is that the data is not saving whenever I tried to update the information in the write panel.

Using the exact code from the example and using my own code are giving me the same issue so I was THINKING that it might be an issue with my server.

Here is the code I’ve written:

Inside functions.php
[Code moderated as per the Forum Rules. Please use the pastebin]

Anyone have any ideas? I’ve been messing with this for hours and I don’t seem to be getting anywhere.

Thanks!