@maikelj1978 Yours sounds like the plugin is either not active or your site has some type of caching that is not bypassed when users log in.
For everyone else looking to solve the fields not appearing issue, it is 100% going to indicate that another plugin or theme on your site also has custom fields and is doing it incorrectly.
As of WP 5.4+ core now includes the necessary hook to add custom fields without the complex requirement of adding extra code. BUT any plugins/themes that didn’t remove their old code or make it only load on older versions of WP it might cause issues.
This outlines the issue the code solutions are a bit old, but you can copy the ones from User Menus which are written in a way that is compatible with any other plugin that is also doing it correctly.
https://docs.wppopupmaker.com/article/297-popup-maker-is-overwriting-my-menu-editor-functions-how-can-i-fix-this
Hope that helps.