Yes, I really understand this, either the link, either it is not declared, but my file does not seem bad in that way... however I do understand that there is obligatory an error, of course ! (Adobe digital editions doesn't want to open it)
Sorry, I may be stupid but I don't find the Advanced mode to reply, so here is a wetransfer link to download my epub :
https://www.wetransfer.com/downloads...6074805/2f2448
Thank you so much for your help (and sorry for my bad english...!), you save me !