Bug :: ITX LUTs don't render in Lumetri input
If you set an .itx LUT as the Input LUT in the Lumetri effect, it will show up in your preview as it should, however when you render your sequence (in PPRO or AME) the LUT gets disabled.
CUBE LUTs work fine in both fields, but as of the latest CC 2018, .itx LUTs only work in the Creative LUT field.
Kevin Monahan commented
Your LUTs wrongly installed in the app package. Things have changed since v. 12.1.
Please install them according to Adobe documentation to start.
Please don't follow install instructions from a five year old internet article. Installation instructions have changed.