I am not using a space in the character name, as I find it can sometimes interfere with the Macros , good idea though. I have not been able to verify if the Default Token was affected yet, and it seems to be just a single token. However, I'm positive that it was in fact linked before, as I had adjusted the HP on the Sheet via the Token, and have been actively using the Token for Macro Verification (I'm using the Chat Menu API Button trick you mentioned elsewhere ), which commonly calls the @{selected| prefix, which is how I found this problem. I'm not currently on Wi-Fi, however I should be able to get access sometime next week, at which point I will be able to test the Default Token settings, which should be correctly assigned, last I had looked. I don't know how to access the Console on my phone, or if I even can. I can verify that the sheet was somehow unlinked though, so I know that it was a problem across multiple browsers. The Cache was not an issue either, as I located the fact that it was not linked after I had cleared my Cache. Antivirus was not an issue On the upside, the newly set up link seems to be sticking. I was unsure if I had missed a Site Overhaul when I had first posted this (the Text Editor overhaul a while back caught me off guard as well, but I've managed to overcome that), and browsing it from my phone I find myself incapable of editing the title, but it's still kinda fitting. At worst; I feel that this thread is capable of helping anyone else who finds themselves in a similar situation to troubleshoot the problem, as the error message was not very informative. This might have simply been a case of Data Corruption. I will update further once I have checked the Default Tokens.