When you export an ad, problems may arise due to unstable networks or file sizes.
Features that may cause export failure:Campaign level
Reach & Frequency Buying type
Catalog Sales Advertising objective
Community Interaction Advertising objective
Shop Purchases Advertising objective
Split test
Ad group level
Value Optimization goal
Ad level
Carousel Ads
Instant Page
To troubleshoot export issues:
Ensure that you are exporting ads in a stable network environment.
Limit your export to 999 rows.