thank you for the video, do you by any chance know how to control multiple V-Ray IES Lights at once? I have multiple lights that I want to set the same intensity for all of them :)
There can be several reasons. 1 - The ies file is corrupt. 2 - not loading the correct ies file. Means they don't load the file with .ies extension. Instead they upload the jpeg that comes with it 3 - there is an issue with file path. The file path is too long. E.g. if this is the case. Paste your ies file to d: drive root and then try to load it.