Changes

:3. Enable API plugin in the plugin section of SimplyBook.me admin page in the section "For developers" by pressing green button "enable near it.  

:3. Enable API Custom Features in the Custom Featuress section of SimplyBook.me admin page in the section "For developers" by pressing green button "enable near it.  

[[File:Enable api plugin.png| center]]

[[File:Enable api plugin.png| center]]

After you enabled the plugin, please press "settings",

After you enabled the Custom Features, please press "settings",