SUMMARY STEPS TO REPRODUCE 1. On computer A, create an encrypted vault, mount it and put a simple file "test" in it. 2. From computer B, use Dolphin's SFTP to access the (mounted) vault on computer A. 3. Using Dolphin (right-click, rename), rename "test" into say "test2". OBSERVED RESULT Dolphin displays an error dialog saying "internal problem" and to report a bug here. File is not renamed. EXPECTED RESULT File should be renamed in the remote vault. SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.18.8 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 ADDITIONAL INFORMATION Problems also appear when copying a file to the remote vault, creating a file or modifying/saving an existing file with Kate : Dolphin displays an error bar above the main view, saying it could not rename the partial file and to verify my access rights. Indeed, I can see a file with .partial at the end, which in each case has the intended content. Setting up a SSH-connexion from computer B to computer A in a terminal to the same vault and issuing rename (mv) command there works.