As there is no reply I would like to add something. In this case href="/webcam/snap.jpg" refers to a non-existing file. This is because of the slash at the beginning.
I do not know the real location of snap.jpg. So I cannot provide the correct href line. I added a troubleshooting section in README <https://github.com/roe-dl/weewx-svg2png>. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/7d940a72-5228-46c3-abbb-255b9aed5c6fn%40googlegroups.com.
