Blog Post
PerBonomi I just hopped off a call with support to debug the issue. Turns out it was trying to add a label to a reply, not the topic, so it was giving me the error.
I was getting the wrong id to POST to because, when you enter the message id in the URL, it just takes you to the topic, without redirecting to a new URL with the topic message id and using the hash fragment to scroll to the message you actually wanted. It made it a bit misleading.
I will note, on my ticket anyways, that updating the error message would've helped me identify the problem more quickly. Right now, the developer message is empty, and the generic error is Permission Denied. Just goes to show you the importance of error messages/logging 😀