Some of us have been having difficulty posting photographs this week. I know that IT have been working hard on the problem. I have been able to post photographs as usual today, so hopefully the problem has been resolved. Thanks IT 🙂
EDIT I now know that the issue doesn’t just affect iPhone and affects jpeg as well as HEIC and HEIF. I am sure that IT will continue to work on it; thanks for the responses. Defining the problem is often the hardest thing to do!