How to manually save the server:
To manually save the server, you will need to install the TShock Mod as the Web Console does not allow input.
Step 1: Log into your game panel.
Step 2: Click on the "Non-Workshop Mods" icon.
Step 3: Install TShock and start your server.
Step 4: Open the Web Console in your panel and follow the instructions for setting up TShock that appear.