An Unexpected HTTP Error occurred during the API request

Hi, I have a new WP install and am getting the following error when I try to search a Theme or Plugin using the inbuilt search facility:

An Unexpected HTTP Error occurred during the API request

I already tried to modify class-http.php by changing

'timeout' => apply_filters( 'http_request_timeout', 5),
			'redirection' => apply_filters( 'http_request_redirection_count', 5),

to

'timeout' => apply_filters( 'http_request_timeout', 30),
			'redirection' => apply_filters( 'http_request_redirection_count', 30),

but I still get the error. Any ideas? Thanks

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