Error: can't initialize Mettle OpenCL Manager on Windows System.

    Please try the following workaround:

    1. Go to C:\Program Files\Adobe\Adobe After Effects CC 2019\Support Files\
    2. See if there is "OpenCL.dll" file inside this folder.
    3. If it's there - remove it.

    There is an issue with (driver, OS or third party software) installing bogus OpenCL.dll inside After Effects folder, breaking all OpenCL based plugins.