I get this message: "Could not delete file <name>".
All items should be deletable in Trash.
KDE Plasma Version: 5.17.1
KDE Frameworks Version: 5.63
Qt Version: 5.14 beta1
To give you more info, I cannot delete folders (with more items inside) that were created by building some code, so I guess something to do with privilleges and/or ownership? Is there a log that would help/show more info? Also this folders can be deleted by other file manager - Thunar.
Yeah, Dolphin doesn't currently have any privilege escalation feature that would allow it to delete files that don't have your user permissions (likely they are root:root or not writable or something).
*** This bug has been marked as a duplicate of bug 179678 ***