404

hello infinityfree.net i have a website called doodletube.ga and i have a pages like about and also a page for blog that is http://doodletube.ga/blog.html/ is not working its redirect me to 404 page i also found a error that in the file manager when we edit a file of html after saving that it is not saving the file properly basically it doesn’t saving the file but showing it is save so that why i make page blog.html and also i have uploaded the file but it is not working so please check system of your hosting and fix this fast as soon

address of your blog is http://doodletube.ga/blog.html

without / at end

your website code is not valid ! multiple <head> etc.
copy/paste your code here and validate/repair errors