So, I've been working on an animation for quite some time now, and pressing space/clicking play to play the animation has always been working. But now, out of nowhere, when I click space or play it doesn't do anything. The FPS counter starts to jump but the "current frame" counter remains at zero. It also kicks me back to the very start of the animation every time I try to play, despite being somewhere else on the timeline.. To be clear, there is no play issue with any other file.
Does anyone know what could be the issue? Thanks in advance.