tldf

What kind of server are you on?
* ( i don’t know how to find these)
Have you asked your host if they are doing maintenance or experiencing issues?
What version of WordPress?

What Browser are you using?
* i am using google,mozilla,and safari. I tried on those three was not able still to log in

Are the error logs in the site files in wp-admin showing anything?
yes these are the errors when i log in it says 505 error

The more information you post about errors/issues you are experiencing the better and quicker someone may be able to help.