Proxy error:couldnot proxy request
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The proxy error problem is because the port number is occupied. The 500 problem on the front end indicates that there is a problem with the back-end server, not the proxy in the front-end vue.config. Check whether the front and rear ports are consistent and whether the database is connected.
Solution:
All changed to local environment
Common web page code
100: continue
200: successful
400: bad request
401: unauthorized
403: the server rejects the request and prohibits
404: the server cannot find the requested page
405: prohibit the method specified in the request
408: request timeout
414: the requested URL is too long for the server to process
500: server internal error
505: the server does not support all HTTP protocol versions in the request
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