Hi, fleur117,
The error message is telling you that there is corruption in your project at or around frame 9666. Most likely it is a black frame. So you need to scroll to frame 9666 and scroll around that area and look for signs of corruption, like black frames, white flashes, artifacts. Cut out any that you find and try to re-share. Best to work with a duplicate of your project so as to preserve your original.
Here is a link to a time to frame converter so you can precisely locate the corrupt frame 9666:
https://www.zapstudio.net/framecalc/
You will need the frame rate of your project to enter into the converter in order for it to make the calculation. Then you enter the frame number of 9666. The frame rate of your project will be the frame rate of the very first video clip (not photo) that you placed into the newly created project. The converter will give you the time point in the timeline at which frame 9666 is located. That's the area that you want to scroll around to see if you can find any black frames or other corruption that you can remove.
A trick for determining the frame rate of a project is to expand your time line out with the slider located above and to the right of the timeline. Then place your cursor on a clip in the timeline and, while pressing down the "r" key, drag your cursor along the clip. A yellow box and a frame counter will appear that displays the frames as you drag along. If, for example, it is a 30 frame per second project when the counter reaches 00:29 that will mean 29 frames.
On the next tick on the 30th frame it will turn to 01:00, meaning 1 second and zero frames, and thus a 30 frame per second project.
-- Rich
