Blur brush tool- not working

[Nita Reed 5]

Before I begin...the image does not show my tool/cursor because I have to select (using my mouse) the area to screenshot w/snipping tool.  Blur brush tool is selected and when my cursor is on the image there is a clear circle.

 

I try to swipe/brush/move the tool (left mouse button clicked and held) over the area I wish to blur.  Nothing happens.

Edited August 4 by Nita Reed

[Nita Reed 5]

Another forum suggested adding noise so I could see what the brush was doing...nothing

[kaffeeundsalz 104]

When you click on the "More" button in the context toolbar, what does the active brush for the tool look like?

[Nita Reed 5]

3 minutes ago, kaffeeundsalz said:

When you click on the "More" button in the context toolbar, what does the active brush for the tool look like?

 

[kaffeeundsalz 104]

Doesn't look like a suitable brush tip. Note how faint the stroke appears in the preview. Please select a solid round brush fom the Brushes panel and try again. It should be something like this: