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Whenever I try to use a Web3 Provider on Remix it says

Not possible to connect to the Web3 provider. Make sure the provider is running and a connection is open (via IPC or RPC).

I have testrpc running, is there anything else required?

marked as duplicate by Ismael, Richard Horrocks, Crema, Achala Dissanayake, eth Nov 2 '17 at 9:47

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The error may be caused by Remix run from https (https://remix.ethereum.org). If so, it should be fixed by switching to http (i.e. http://remix.ethereum.org)

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