Hey there @Jeanbr, thanks for reaching out to the Community!
So that I can have a better idea of the issue that you're having, please let me know the following:
- Are you uploading through automatic camera uploads, or manually using the + button?
- How much free space do you have in your Dropbox account?
- How much space do you have free on your device?
Also, you mentioned having the latest app and iOS versions. Can you confirm for me exactly which version numbers these are?
Keep me posted!