Hey there! I have an issue with creating an installer on my 5K 2015 iMac.

Very sorry about the shakiness of the video... Anyways, as seen in the video, am I doing anything wrong? I got the Sequoia installer from Mr.Macintosh, since the built in installer on OCLP would keep getting an error. Even with Mr.Macintosh, the installation instantly cancels. Thanks!