in that case, i'll elaborate a little bit further. I tried both restarting my computer, and clearing my cache/cookies, no success. However, everything seems to work fine if I use my laptop. (with the same browser and operating system, Windows 10 for reference) It would make me think that something was wrong on my end if you didn't mention other people also having issues. and also because I genuinely have no idea what the problem could even be. some other weird details (in addition to the consistently blank compendium of course): First, the compendium icon is being... well wierd. it's there most of the time, but it does like to dissapear for 5-10 seconds every so often for some reason. The icon also loads in as the last of the icons, a notable number of seconds behind the others. just overall compendium icon wierdness there. The second thing is something i thought was unrelated, but also turned out to be persistent. whatever's going on seems to be drastically impacting some of R20s core functionality in a strange way. Specifically, Character/NPC sheets take a notably longer time to load, as do maps, sometimes i have to refresh to get that to work at all. The most notable issue here is dice rolls, which seem to be significantly delayed to the point of being unusable, sometimes even taking an entire minute to roll, and never less than 30 seconds. I didn't mention these issues because i assumed it was my internet that was freaking out, making it a seperate issue, but testing it on my functional laptop (with both a weaker connection to the internet due to wireless and weaker hardware) made it obvious that the internet was not the problem at all, and given these issues started and are continuing still at the exact same time, i can only assume they are connected. Hopefully this info helps.