When you are loading your own image for XClick or XClickRelative, you HAVE to rename the image as “_dpi_120.png” at the end.
It will not work if .PNG is capitalized.
It will not work if you don’t have “_dpi_120” at the end.
Note: If you use the application to take the screenshot, this is not a concern. I have a use case where clicking outside of the window causes my popup to disappear, so uploading my own screenshot was my only option. These are a few things I noticed to hopefully make the process smoother for the next user.