XF 1.4 'This webpage is not available', but it is.

[Alexander Firth]

About 30% of the time when I click on my index (http://youthdebates.org/forums) I get an error saying 'this webpage is not available'. The thing is, it only appears for about 2 seconds, then the page loads as normal. Is this likely to be something on my personal end, or something in the server/XF itself?

 

[Paul B]

I have just refreshed around 20 times without issue.

It could be your connection.
Try pinging it/tracert and see if you can see where it's failing.

 

[Steve F]

I get that myself on sites when my router or Internet isn't acting correctly. Exact same thing as you describe, few seconds and it reloads fine.