Am I the only one?

Yes. I have a similar problem to yours. But, rather than not being able to submit, I need a shorter response.

I've been having that issue (but it also gets rid of my লিঙ্ক when I update it that way). I'm getting fed up with it.
I'm not sure if this is coincidence, but after a long time of trying to সম্পাদনা my profile, I switched back to English ফ্যানপপ and was able to successfully সম্পাদনা it right away. Idk, are আপনি sticking with just regular English Fanpop?

আপনি have to shorten some of your responses like your পছন্দ বই অথবা authors অথবা your পছন্দ চলচ্চিত্র অথবা song artists. After shortening these, it should allow আপনি to জমা করুন it. If this still doesn't work, refresh the page a couple of times. I had the exact same thing happen. Hope this helps!