<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 5.19.6

Error message:
Invalid access to memory.

Stack trace:
(00FC3A0E) C5246_0
(00FC4C46) C5294_3
(00FC6CAE) ____ExceptionHandler
(00FC3A68) __ExceptionHandler
(0008786F) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00CD954B) THierarchicalStorage::ReadString
(00CD7044) THierarchicalStorage::ReadAccessString
(00CD712B) THierarchicalStorage::ReadAccess
(00CD76B7) THierarchicalStorage::OpenSubKey
(00CDCC4E) TCustomIniFileStorage::OpenSubKey
(00C94350) TConfiguration::LoadFrom
(000D3521) TWinConfiguration::LoadFrom
(00C946AD) TConfiguration::Load
(00CA62F5) CoreLoad
(00CA6447) CoreInitialize
(00FC2C59) C5162_0
(00066A9C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066A69) ntdll.dll.RtlGetAppContainerNamedObjectPath

The problem happens rarely. I cannot reproduce it.