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When I choose localhost 8545 in MetaMask, apparently it is not able to connect. Please see screen shot:

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I tried with several internet connection, however the same result.

Whereas, I can easily connect to ex. Ropsten.

Do I need to run testRPC before connecting to localhost 8545 ?

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  • I has the same issue, swap some BNB to ETH and My ETH appeared in localhost8545, how I can recuperate? When I try to connect to localhost shows a message that's unavailable. I must to run testrpc? How and where I must to do it? Please, thanks for your help. May 4, 2021 at 19:04

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Yes, you need to run testRPC before connecting Metamask. Check the port that testRPC is using as well it should be 8545

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