Urgent help needed - Site no longer working

My site has suddenly stopped working and I raised a support ticket with my hosting company who have tracked down the issue to the following error

rawurlencode() expects parameter 1 to be string, array given in /home/saintsns/public_html/templates/base/scripts/BxBaseMenu.php on line 352

Nothing has changed so I am at a loss as to why this has suddenly happened.

If anyone has any ideas or suggest that could help...

Many thanks

I managed to sort my problem out.  It turned out to be an issue with 7.0.4 and since upgrading to 7.0.5 and then to 7.0.6 my site is now working again.