SpringBoot: Whitelabel Error Page 404 [How to Solve]

Project: springboot + Vue

Reason: after the online environment is released, it can’t get into the system. The above error has been reported all the time, and it’s useless to repackage and compile. The original reason is that the front end downloaded a new dependency and didn’t upload the updated version number, resulting in the above error
solution: import the dependencies downloaded from the front end into the local NPM install, submit the package.json file to the online server, and redistribute the version to solve the problem.


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