Accessing Option on Multisite

I’m using the tutorial found on the Snippets Library almost untouched.

I’m not able to get hold of my saved option via myprefix_get_option('test_text') or via get_option directly in a template used on every site in my network.

The only change I made to the snippet is on line 47 where I hooked into admin_network_menu. I’ve saved content, so saving works fine; everything shows up nicely in the Network Dash.

Is there any reason why get_option/myprefix_get_option return nothing? I feel like I’m overlooking something.

https://ww.wp.xz.cn/plugins/cmb2/