Thanks for your report.
I have sent you an email with a debug version of WinSCP to address you have used to register on this forum.
                
            
        
    
    
        
        
            
            
                <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 5.7
Error message:
Invalid access to memory.
Stack trace:
[01709F31] 
[018E05DE] 
[018E2646] 
[018DF5C0] 
[77AB023E] ntdll.dll.ZwWow64CallFunction64
[77AB09BA] ntdll.dll.KiUserExceptionDispatcher
[017078BA] 
[01707DBF] 
[0170B5B8] 
[0170B689] 
[016E14D5] 
[016E66A2] 
[016F1EBC] 
[017A111A] 
[01809917] 
[0176F620] 
[0176DAFC] 
[01183167] 
[75307C02] KERNEL32.DLL.BaseThreadInitThunk
[77ACB54D] ntdll.dll
[77ACB515] ntdll.dll
[018E0C49] 
[018E2223] 
[017A12D7] 
[01809917] 
[0176F620] 
[0176DAFC] 
[01183167] 
[75307C02] KERNEL32.DLL.BaseThreadInitThunk
[77ACB54D] ntdll.dll
[77ACB515] ntdll.dll
[018E0C49] 
[018E2223] 
[01809A41] 
[0176F620] 
[0176DAFC] 
[01183167] 
[75307C02] KERNEL32.DLL.BaseThreadInitThunk
[77ACB54D] ntdll.dll
[77ACB515] ntdll.dll
[018E0C49] 
[018E2223] 
[01809E43] 
[0176F620] 
[0176DAFC] 
[01183167] 
[75307C02] KERNEL32.DLL.BaseThreadInitThunk
[77ACB54D] ntdll.dll
[77ACB515] ntdll.dll