Error edit codes

Hi dear,

I have installed the plugin correctly, subsequently I have created an folder and uploaded the files via ftp.
I have added the files for the download without problems, but when I go to create / edit codes for each release I get the follow error:
“you don’t have permissions to acces to this page”

please I need help very urgent!!!

https://ww.wp.xz.cn/plugins/wp-download-codes/