PremiereRush Wont Render/Save to Disk

I'm using PR on my Samsung Galaxy s10+. I've made anther video this morning but now when I go to render and share my new video, PR scrubs through the video but then an error comes up that there was an error saving it to the disc but at the same time, a green check marks says it's saved to my camera roll. It's not though. It's a 15 second video, using downloaded video that I've used in PR already, on the same day. Cleared space on my phone and restarted it, still the same error and no save.