I am having the same problem of error 404 too. I set permalinks to Post name at first. It looks like this. https://essenceofasiatours.com/blog/sample-post/
A few days later after I posted some articles, I could not open the links anymore. It says error 404 page not found. I switched back to default setup in permalinks, it works. However, I want to use the Post name instead of default. I uploaded the .htaccess to the Cpanel and change the permission number to 755 and recheck the site again. It still doesn’t work. Is there another way to fix this problem?
I really need help