: Older third-party XMP panels may not be compatible with newer versions of Photoshop due to changes in how Adobe handles metadata UI extensions. If you are creating your own, you must follow the Adobe XMP Metadata UI SDK guidelines. for your own metadata panel? file info - Adobe Community
: Users can switch between different panels at the top of the tab to view specific data sets. xmp panels 4.0 sti photoshop
While some panels use automated installers, manual placement is often required for legacy or custom XMP panels: : Older third-party XMP panels may not be
"Please run the XMP Panels 4.0 STI first and restart your app" . This often occurs if: xmp files - Adobe Community xmp panels 4.0 sti photoshop