This is likely caused by https://github.com/NodeBB/NodeBB/issues/4978
I sent a PR to the ns-spoiler plugin that should fix the issue for now.
all right , check this please
Can you take a look at the response of the
/api/post/upload request in your browser console?
Do you see any errors for the /api/post/upload request when you upload something.
@patrick-anderson It should be on the network tab of your browsers console. Try uploading something while the network tab is open and it should show you the failing request. Then you can check what the server has returned in the same window.