Digital Light & Color

An update is available to Version 8.0.105 (4-Jun-2020)

The changes (taken from the update log) are:

Selective Color Correction Transformation and Control: removed Radius Slider and added Weight Sliders for each control point, similar to the new Hue Saturation Control. Existing scripts containing Selective Correction transformations will work the same as before. New scripts will be saved without a radius setting and with individual weights, so the results may be slightly different if you open a script and then save a new version.

Updated lcms (color management system) to version 2.10.

Updated ExifTool to version 11.99.

Added support for Nik Plugins version 3 which adds a new Perspective Efex filter.

Added support for Nik Plugins version 3 which adds a new Perspective Efex filter.

I guess you dropped the support for Nik Plugin version 2 :-(
At least on my system.

I did not change anything that should have affected version 2 plugins. Are you sure you had an image selected when you tried to invoke the plugin?

Sorry you are right. My fault :-(