This error effectively paralyzes Photoshop. Without the homescreen extension, you cannot see your recent files, access cloud documents, or sometimes even open the standard "New File" dialog. The good news? This is a known issue with a set of reliable fixes.
This error often results in a blank, black, or grey home screen, or a persistent pop-up warning upon startup. Why Does This Error Occur? failed to load the uxp homescreen extension photoshop 2021
Ensure you have sufficient disk space, as low space can cause file system errors during plugin loading. Adobe Help Center Manual UXP Plugin Management This error effectively paralyzes Photoshop
The error "Failed to load the UXP homescreen extension" in Photoshop 2021 typically occurs due to corrupted UXP cache files or conflicts with the new Unified Extensibility Platform (UXP) system introduced in that version . This is a known issue with a set of reliable fixes
If you need to get back to work immediately without fixing the underlying UXP issue, you can revert to the older document interface. Adobe UXP Introduction