: The official recommendation for a missing amtlib.dll is a clean reinstallation.
: A genuine amtlib.dll is digitally signed by Adobe and handles activation.
: Security software sometimes flags amtlib.dll as a false positive and removes it. Check your quarantine folder to see if it was blocked.
: Sometimes DLL errors in Premiere Pro are actually caused by missing system components. Installing the Visual C++ Redistributable for Visual Studio 2012 may resolve related launch issues. Important Considerations
.dll files missing error in Premiere Pro CC - Adobe Community
: In a standard 64-bit installation, this file is typically located in the application's root directory, such as C:\Program Files\Adobe\Adobe Premiere Pro CC 2017 .