When I install shuguang cms to the VM, the Accessdeniedforuser 'root' @ 'localhost' is reported'

When I Install shuguang cms to a VM, the following error occurs: Accessdeniedforuser 'root' @ 'localhost' Sugon cms is an installation program based on thinkphp. installation in Install under the project folder is required when it arrives at the VM. otherwise, the installation error Accessdeniedforuser 'root' @ 'loc. when I install the shuguang cms to the VM, Access denied for user 'root' @ 'localhost' is reported'
Sugon cms is based on thinkphp
When installing programs to a VM, you need to use the installation programs in Install under the project folder.
Otherwise, the installation fails.
Access denied for user 'root' @ 'localhost' (using password: YES)
An error occurred while checking the database configuration.
However, I checked the database account and password in database. inc. php all over and over again.
Hope to help solve Cainiao problems

------ Solution --------------------
The root user is not found due to configuration issues.
It proves that the root user area was used for login, but now the administrator account has been changed, and the root user cannot be used for login again.
Check whether there is a cache problem.