Security Provider Enforcer - the window appears, but is it empty ?!

Good morning to all Wapplers,

I wanted to create a restricted access page, so following the step by step guide, I came to the point of:

On the page concerned:

1. select APP
2. click on “Security Provider Enforcer”
3. The window opens, but is it empty ?!

I can’t go on, I just can’t understand why and I’m stuck.

I tried to:

• click on the “reload page” icon> no effect
• save the page> no effect
• restart Wappler> no effect
• completely restart the PC> no effect

I attach a print screen as an attachment,
spent someone can help me, maybe I’m forgetting or making a mistake?

wappler_problem_1695×1108 33.6 KB