Named character reference was not terminated by a semicolon. (Or “&” should have been escaped as “&amp;”.)
मुं होनाय हांखो रायखांनायखौ सेमिकलनजों थाद'होनाय जायाखै। (एबा “&” खौ “&amp;” बादि एसकेप खालामबाय जानांगौ)