Website is not opening

Hello Team,
I am observing since last 20 days, my site is not opening in one time. always i need to refresh the page more than three times, then the website is open. but since yesterday site is not opening.
could you please check at your end why it is not opening.

What’s the domain that has this problem?

Can you please clarify what “not opening” means for you? Do you see any error page? Could you show a screenshot of what you see instead?

my Website page is not opening.
that is the problem, i do not see any error on the page progress bar has been completed and nothing shows on the page.

the erro is showing given below

This page isn’t working is currently unable to handle this request.


please enable error reporting

this is showing this error

Warning: require_once(includes/class-functions.php): failed to open stream: No such file or directory in /home/vol6_1/ on line 24

Fatal error: require_once(): Failed opening required ‘includes/class-functions.php’ (include_path=‘.:/usr/share/pear/’) in /home/vol6_1/ on line 24

hey thanks,
i have deleted a plugin which was creating a problem. now my site is functional.

thanks for your help