When attempting to setup a screensaver, the screensaver fails to display. All I get is a blank screen. I get the same result on Windows 10x64 Pro an Windows 11x64 Pro

1. Checkmark "Allow screensaver to manage the screen Saver"
2. Checkmark "Span Screen Saver across all monitors" Same result if this is unchecked.
3. Select the Mystify Screen Saver
4. Checkmark "Use Preview mode...........
5. Set Timeout to 2 minutes
6. Select Preview
7. Select Save
Result: Blank screens

I have a somewhat similar experience as siliconman01, although slightly different...
1. Checkmark "Allow screensaver to manage the screen Saver"
2. Checkmark "Span Screen Saver across all monitors" Same result if this is unchecked.
3. Select the Mystify Screen Saver (or any other.. doesn't matter which)
3a. If I at this point push "Settings", DF will prompt with "Please select a Screen Saver first"
4. (Checkmark "Use Preview mode...........) This is preselected and grayed out
5-7. Same result

But if I from here go straight to 'Apply' or 'OK' (or even if I skip 5-7) DF will prompt 'Loading', the bar goes 5-10% then disappears and DF reverts to '-- No Screen Saver --'

Windows 11 Ver 21H2 (build 22000.527)
DF Pro 10.0 (beta 13)

Thank you, now the different screensavers actually work

An issue that persists from beta 13 though, is that on enabling and disabling the screensaver... the screen goes bright white before going to which ever SS is selected or back to 'normal' view.
I have no idea if this happened with earlier versions.