When there are no new posts the search obviously can not find anything so is told to output an error message via the language key of $lang['No_search_match']
this would be something like:
else { message_die(GENERAL_MESSAGE, $lang['No_search_match']); }
My guess is since this is an information message only there is no need to output the page as usual.
In short this is by design and not an error. So no amount of settings changes can alter this.
However a few edits can sort this for you so] message_die(GENERAL_MESSAGE, $lang['No_search_match']);[/code]
BEFORE, ADD
// start proper output of page include($phpbb_root_path . 'includes/page_header.'.$phpEx); // end proper output
As said there are 3 instances and be sure to find them all and add the above code before. SAVE & CLOSE file.
The comments are just to enable deletion of changes if need be. Hope this helps.
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