Seeing a Null Pointer Exception when using Pixel Inspection Tool

ImageJ 1.54f

Exception in thread "Pixel Inspector" java.lang.NullPointerException
at ij.plugin.tool.PixelInspector.addImageListeners(PixelInspectionTool.java:238)
at ij.plugin.tool.PixelInspector.writeNumbers(PixelInspectionTool.java:351)
at ij.plugin.tool.PixelInspector.run(PixelInspectionTool.java:330)
at java.lang.Thread.run(Thread.java:748)

Steps:

1. Open up Fiji
2. Select Pixel Inspection Tool on Toolbar
3. Open up File->Open Samples->Fluorecsnt Cells
4. Left click anywhere on Image
a. Pixle Inspection Window pops up
5. Close Fluorecsnt Cells window
6. Open up again File->Open Samples->Fluorecsnt Cells
a. Console window with Null Pointer Exception pops up

See screen recording:

https://github.com/imagej/ImageJ/assets/40019379/3c8455ff-ea7c-4a3b-802f-61b3ee8e1afd

PixelInspectionTool.java from GitHub:

https://github.com/imagej/ImageJ/blob/master/ij/plugin/tool/PixelInspectionTool.java

This might be the offending code if variable **win** is null at line 238.

if (win == null) close();
canvas = win.getCanvas();

Start with ij/plugin/tool/PixelInspectionTool.java, especially addImageListeners around line 238, and reproduce the listed Fiji steps: open the Fluorescent Cells sample, use Pixel Inspection, close the image, then reopen it. Done means reopening the sample no longer produces the reported NullPointerException.

Written by the indexing model from the issue text.