Domain pointing to directory

I have a domain on hostgator, earlier today I uninstalled www.remarpro.com and did a clean reinstall. Now, when I go to my domain from my phone, it just hows directory such as:
Index of/
?qidb/ (when clicked on, it says:Not Acceptable! An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_security)
?well-known/ (when clicked on, it sends me to the website, working, but saying domainname.com/.well-known)

Apache Server at domainname.com Port 443

This is strange, this problem does not occur at all on my desktop where I only need to type the domainname.com and it works!

Please could anyone help me? thank you!