Uninstalled the original log server and then installed the other version log server, when login log server, it appeared 404 error.
When reinstall the log server:
1. If you want to use the original data of the database, the version of the log server must be consistent with the version before uninstalled.
2. If there is no need to keep the original data of database, please reinitialize the database when reinstall log server.
It hasn’t deleted the data in the database when uninstalling the original version log server, and it hasn’t reinitialize the database when installing other version log server. The original data can’t match with the version of the new installed log server, which leads to appear the 404 error when the administrator login in log server.