What is the stream_set_option parameter, and how do I resolve its reporting erro

Deer engineer：

I in stalled the OSS plugin in the background of my website.

OSS plugin description: https://wordpress.org/plugins/oss-upload/

When the plug-in was successfully launched, I found the following information:

Warning: include(): OSSWrapper::stream_set_option is not implemented! in /www/wwwroot/www.****************.com/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/font-manager.class.php on line 477

Now, I want to fix this report error.Ask the great engineer to help me.

best regards！

Enfold’s old friend: Tom