I see that the preview issue has been common for other writers at the moment, so my grey’d out preview bar only working every now and then isn’t much of a problem.
However, I’ve added a bunch of backgrounds and overlays. I tried to use one of them in my next episode and it’s telling me to “Please correct your script errors to preview your story.” - the only script error is the one that notifies you that your backgrounds hasn’t been approved.
I am experiencing the same problem at the moment. Anytime I clicked the preview button, it would turn grey and it would not have the ability to click anymore. Out of anger, I would click the grey preview button again hoping it would let me preview. However, a message would pop up saying that I have errors to correct even though there isn’t any coding errors. Like you said, the only script error I am seeing is the " Background hasn’t been approved".
I ended up sending a long email to the support team explaining everything to them and they responded giving me a list of things to try. Guess what? None of them worked, and I am really really REALLY frustrated to be honest. I hope they get this bug fixed as soon as possible so that I can resume to my stories as normal.