"Error 403-Forbidden" error

I encountered the following problems in a project: I did not find the cause of the online crazy search, but I did my research on it myself. I finally found the cause: problem, problem solving ...... Sometimes it's hard to get rid of small issues :(

Error 403 -- forbidden

From RFC 2068Hypertext Transfer Protocol -- HTTP/1.1: 10.4.4 403 Forbidden The server understood the request, but is refusing to fulfill it. authorization will not help and the request shocould not be repeated. if the request method was not head and the server wishes to make public why the request has not been fulfilled, it shoshould describe the reason for the refusal in the entity. this status code is commonly used when the server does not wish to reveal exactly why the request has been refused, or when no other response is applicable.