Drupal Hosts : Errors found once site is installed

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This is a drupal question asked by jesse anger on 03 July 2009

I’m getting these errors in my admin section of drupal that im unsure i can fix. could someone clarify if i can fix these or will my hosting provider have too?

First error:

HTTP request status Fails
Your system or network configuration does not allow Drupal to access web pages, resulting in reduced functionality. This could be due to your webserver configuration or PHP settings, and should be resolved in order to download information about available updates, fetch aggregator feeds, sign in via OpenID, or use other network-dependent services.

Second error:

Unicode library Standard PHP
Operations on Unicode strings are emulated on a best-effort basis. Install the PHP mbstring extension for improved Unicode support.

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