How to Solve Activation Failed (3) Error for Lightroom on Windows

I Updated to PS version CC 2018 and the JPEGmini Extension Doesn't Appear

Invalid Activation Code

Invalid Receipt Error on Mac

JPEGmini Skipped My Photos

Adobe Lightroom Activation failed (2004) Error

JPEGmini Error Messages and Their Meanings

Unable to start JPEGmini Pro trial

JPEGmini Pro 2 and 3 on Windows may not launch

"Write Failed" error when trying to optimize images on a macOS

"Write Failed" error can happen sometimes when using external drives on the latest macOS versions (starting from macOS Catalina) - perhaps due to the tightened security introduced by Apple, but there's a simple workaround.