QuoteI have access to most of the Mega Scan Library, if you post (or private pm) the file I can almost certainly re-create it without you having to share the commercial file.
Alternatively, try to convert the exr to a 16bit tiff and see if the issue remains. I doubt the image would look any different after the conversion.
The material causing the error is "pine_2x2m_Bark_Pine_vmbibe2g." The displacement file is "vmbibe2g_4K_Displacement.exr."
I checked other Megascans surface materials, though, and found that many of them use "[R]" single-channel EXR files for displacement. They are easy to spot in Adobe Bridge -- the thumbnail previews show up bright red.
Opening and simply resaving the files (as OpenEXR) in Photoshop converts them to RGB files and fixes the problem.
The attached tgd will show the error. I've removed the displacement file from the Project_Assets folder -- you'll need to drop it in there. Here's what I see when I open the tgd:
trImage attempting to read file Project_Assets/vmbibe2g_4K_Displacement.exr
FreeImage error: Warning: loading color model R as Y color modelThe error appears benign in that it doesn't cause any rendering problems . . . but as I suspected no displacement or bump is produced. The attached renderings show the results of using the original EXR file vs. one fixed by a round trip through Photoshop.
Interesting.