Screenshot in .PNG error

Hi, I made anki cards on MacBook and put there screenshot in .PNG (work very well), but when I try open on iPhone and iPad there is question mark instead of .PNG screenshot. I tried put other formats like .JPG and .HEIC and still doesnˇt work. Do you have any tips how solve this problem ?

Thank you for yours answers.

Is it possible that the images haven’t had enough time to sync? Media files may take time to sync - Frequently Asked Questions

Please make sure you tap on the sync button in AnkiMobile each time you want to sync - you don’t appear to have done so for a few days. More info: