I’m sorry that the software is so unforgiving in this respect, but we should be able to get this working better for you. I have tweaked your user account to try to enable the Add Media button. Perhaps you could try it, when convenient. You’ll probably find (at best) that your post will be held for approval, but if so I’ll receive a notification and should be able to give it the nod. If however you don’t see the Add Media button then just let me know and I’ll do something different.