The needed screen cannot be opened

[mpdkorat 0]

I have a Samsung S6. I run the scan and I get:

1. Your device has issues

2. I press "Fix now"

3. Security Audit detected some issues

4.  I press "Go to security audit"

5. Insecure Settings  -  Development mode (Turned Off)

6. I press to turn on

7. I the get the message "The needed screen cannot be opened. Please open it manually"

 

This is where I need help. What screen and where to open it manually?

 

Thanks in advance.