Before execute factortyreset, I suggest you clear up all cached web content. Different browser has different procedure. e. g . Firefox 57.0.4 64bit, which is the browser I'm using now. From open menu-options-privacy and security-cached web content, click "Clear now". Close your web browser and re open it.
For the last resort, please collect HTTPSD debug infomation if you could. Make sure don't break any service in your production.