I did set up this extension, and i installed graphwiz, mscgen and plantuml, and it works beautifully for these three languages. before i installed the respective binaries, there was an error message telling me that the binary was not found, which was helpful.
unfortunately i dont have any luck with mermaid. the images simply do not render. where the image should be, there is a hidden div containing the mermaid source, so i can see that the tag is read correctly and interpreted, as having the source in a hidden element (which will then be read and replaced by javascript) is the normal way. problem is, the actual rendering of the mermaid diagram never takes place, so that no image is generated, and no error either.
can this be because the computer the webserver is running on is behind a proxy? shouldnt it work anyways because the extension ships its own mermaid files?