I'm running a 1.15.2 forge server with some mods on it. All links that spark provides to view the results of the sampler for example return with a 404 error.

This is one of my links, I've had others try the same one and different browsers etc. I am running spark on the client as well, could this be an issue? I've used it before and it worked fine, simply using /sparkc instead. I don't know if this is a version specific thing, or if all versions of spark have this issue right now.

Hi, you can try replacing the sparkprofiler.github.io URL with spark.lucko.me.

That said, the viewer has changed quite a bit since 1.15.2 was released. Unfortunately I don't have the capacity to keep maintaining old versions forever. Sorry :(