jessi-poo wrote:I am in the original project itself I'm in with all my clips, just the timeline I need for some reason has disappeared, how can I fix this?
If it's literally not there in the project, I don't have a solution. One thing we routinely do every day (particularly for long-term projects that go for a week or more) is to manually back up a DRP session file every day and give it a date. If we need to go back and get Thursday's session on a Friday, we can import that into the project manager, get whatever is missing from the Friday session, and move on from there.
In general, I've never seen anything suddenly disappear from any Resolve sessions (in almost 15 years), but I have run into situations where I was tired and accidentally deleted a dozen or more clips from a timeline without noticing it. Then when I notice the problem the next day, I'm screwed until I check the backup session. Then and only then, I can fix the missing clips. It's only happened maybe 3 or 4 times to me in years and years -- most recently, it happened to me back in January -- but I was glad the backup was there when I needed it.
Resolve is generally very reliable and this kind of thing should not happen. I don't doubt you're seeing that in your session, but rather than point fingers, I'd say you've got to move forward and try to find a way to continue and rebuild what you lost.