A few times in last week, I had error messages, like file to big, OOPs., contact the administrator there has been a problem, etc. when I have tried to upload even small size pics, under 1900px wide or 10mb pictures..
I found out what the reason was for me....... MY... on my end, Spectrum cable and my ULPLOAD speed was extremely slow (01., 0.2) because of local "node" overlaod/ activity, due to so many people online, working from home, socializing via internet, etc..
Anyway, when I tried to upload to this, forum, even the smallest size pic was uploading so slow, thanks to the upload slow down on my end, that the forum server must have decided that is was taking so so long to upload my pic that the pic size was thus way large and thus the forum error notice..
Perhaps this is why you are getting you pic is to big error notice.
Oh, I upgradd my Spectrum and now my uploads speeds are always a bit better, so no more forum error notices when I try to upload pics.