After changed ICQ number setting, my webpage gone down

[Halfway233]

I was setting my forum, then I saw ICQ numbers section and wanted to disable it.
As soon as I disabled it, my forum never opened again, while connecting it is said as:
"This site can't be reached"
ERR_CONNECTION_TIMED_OUT

Even I cannot connect to my Cpanel.
And don't know what to do.

I was using 2.1.3 patch btw

[Aleksi "Lex" Kilpinen]

If you can't even reach your cpanel, it is not just something wrong with SMF.
If you can't get to your hosting control panel, please reach out to your host and ask them to look at what went wrong.