Silt seems to not be working for me. Imgix seems to be the problem. I switched it to https://dummyimage.com/ which works for now. it's not capable of line breaks though :(
Silt command not working
/silt command appears to be broken...it acts like it fucntions but displays nothing on a sign.
Command used: /silt Hello
I can't be certain but it appears that the silt command actually makes a callout to an online graphics API at http://assets.imgix.net. This appears to currently be a for pay image "function" service. I'm wondering if it was free at one time and became a for pay service later, rendering that functionality no longer viable.
The callout I see in the logs is this (for example): http://assets.imgix.net/~text?fm=png32&txtalign=middle,center&txtsize=80&txt=Hello&w=128&h=64&txtclr=000&bg=0FFF
Going to that in a browser brings up nothing and looking through the docs for the service, it makes it seem like this wouldn't work without a subscription to their service.
Regular URL callouts work fine on my server using the /sil command.