![]() Don't neglect warning just looking at the error alone. ![]() To resolve this error, install the proper package by specifing the npm scope with npm install don't need to remove the wrongly installed package. The error is because, when we install react-router-redux package, by default we install this one. ![]() When I googled for the above error with the keyword "ConnectedRouter" I found the solution in a GitHub page. I have the following line at the index.js. I was able to resolve only after looking at this warning, mentioned above. atomic number3 atomic weight6.941 melting point180.5 C (356.9 F) boiling point1,342 C (2,448 F) specific gravity0.534 at 20 C. The metal itselfwhich is soft, white, and lustrousand several of its alloys and compounds are produced on an industrial scale. I couldn't understand the error since it doesn't mention any method or file name. lithium (Li), chemical element of Group 1 (Ia) in the periodic table, the alkali metal group, lightest of the solid elements. You likely forgot to export your component from the file it's defined in. Invariant.js:42 Uncaught Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. List of elements Atomic Number Name Symbol Group Period Number Block State at. Warning.js:33 Warning: React.createElement: type is invalid - expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Don't get surprised by the list of answers for a single question.
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