Cannot load libwebp.dll in umbraco

Questions
1

Dear Team,

Please suggest on below in umbraco 8

I have installed Our.Umbraco.AutoImageOptimze package in cms

and added "mimeType=“image/webp” line in web.config file

still am getting below issue, please suggest on below.

enter image description here
enter image description here1434×797 59 KB

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/103532-cannot-load-libwebpdll-in-umbraco