Dedecms Backstage Login not what to do

1.session problem

See if the Datasessions folder for the next space has write permissions, and each logon session's parameters are saved in the session generated under this folder

File sess_dc9d7a2f6d6125ab681dcbafff123456 Each session file will determine whether you are logged in.
If you have write permission, you will generate a new file to view the file date when you log in.
If you do not generate a new file, the folder does not have write permissions, please assign write permission.

If you have write permission, or if you are not logged in, empty the files in the sessions folder, log back in and clear the browser cache.

2. Direct Address bar Transfer account password (Novice does not recommend)

Directly enter the background address: Localhost/dede/login.php?dopost=login&userid=admin&pwd=admin

Pass three parameters on the line, dopost=login userid = account number, pwd= password.