When I go to http://www.jiadep.org/Chart-Shikei.html and see the broken image graphic, I single-right-click on it to Open Link in a new window.
There I see that the URL of that link is
If I Inspect the element, I see that it’s coded as follows:
<img class="imageStyle" alt =" Chart-Shikei" src="Chart-Shikei_files/-chart-shikei.html"> =$0
which suggests that somewhere within RW the path to the (sub?)directory is being coded/written with a dash before the ‘chart…’ string.
The same applies to the actual
<a href…> in the line above.
I’m not familiar enough with the way you have your project set up. But if you can find that dash, I think you will have found your error.
I would have said that it’s significant that both the path to the Resources directory and to the ‘Chart-Shikei_files/-chart-shikei.html’ file have the leading interloper dash.
Maybe even that one has an upper case ‘C’ and the other a lower case ‘c’?