Error code: -1609629695 Help, please

Also try disabling CUDA or copying everything from one sequence to another

This error code is infamous: https://adobe-video.uservoice.com/forums/911233-premiere-pro/suggestions/33904732-the-infamous-gpu-render-error-1609629695

This isn't enough information to tell you what the actual problem is, but the error does actually have some helpful information. It's telling you that there's an issue at frame 8. Where is this project coming from, After Effects, Premiere, Audition? There's something going on at frame 8 that is causing an issue. It could be a keyframe, a transition, an effect, or anything else. Find that clip, look what's happening at that exact frame and remove it. If you can export successfully after that then try to reapply whatever you removed again. Sometimes that's enough to fix the issue. If reapplying whatever you removed didn't work, try doing it a different way. Without any more information or knowing what's going on at frame 8, I can't offer any other suggestions.