I am getting some error(picture below) while trying to connect DApp with a backend. One day ago, everything worked fine, now I got an error: "basic auth failure". Contracts are deployed on Ropsten Test Network, of course using truffle. Although the message is presented, I am unable to debug it further. Any helpful guides or suggestions?

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So the problem was actually in providing a HTTP Provider. I provided it twice, first one in truffle.js and second one in one of VueJS Components I created. So pay attention on it.

Answer found: here. Thanks to abed for the tip.

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