I cannot export videos in high quality, i need help

Everytime i create a video and export it, it shows it has 0bytes and wont open. I havent had this issue before so i don’t know what caused it. It will export if i lower the quality to 720, but i don’t want the lower quality. If anyone can help me and tell me why this might be happening and how i can fix it. I have tried contacting the twinmotion support and no one answered. Please i’m desperate.