well mate, it’s an error message that you get typically when you’re working with xml files. the “content is not allowed in prolog” error basically tells you that something’s going wrong at the very start of your xml file, i.e., the prolog part, which is supposed to strictly contain only xml declaration and/or doctype. there might be some unplanned, for example a hidden character, or unwanted spaces right before your xml declaration. or maybe an incorrect encoding format. so you may wanna check and clean up the start of your document or check the encoding format again. also, strictly stick to utf-8 encoding, trust me mate it’s the safest bet. keep experimenting till you find what’s messed up, cause xml is quite picky about its syntax and well, won’t budge until you fix it right.