<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.19.1

Error message:
Range check error

Stapelverfolgung:
(0043DDF5)
(0043DDF5)
(0043DFD5)
(003F26FD)
(003F26A8)
(00C88C12)
(000CC297)
(00C9D5E6)
(00C9D7C7)
(00FBA019)
(00066A9C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066A69) ntdll.dll.RtlGetAppContainerNamedObjectPath

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.