The file duration is incorrect (either too long or too short).
The number of frames (duration) detected by the QC does not match the number of frames entered into the Campaign when the Ad was created.
Firstly, always check the campaign - this could be incorrect rather than the file.
If not add or remove any additional frames in the edit suite before re-exporting.
Our Peach Export Guides can help you ensure your settings are correct when exporting files.
The correct duration of the file is the number of seconds x frame rate
e.g. 10” x 25 fps = 250
Please ensure the number of mute audio frames is not affected when changing the duration of a file (UK, Ireland, Japan & Australia only).