Invalid access to memory - TMessageForm::WMGetObject

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
The error occurs when I select files and folders on the remote server and try to delete them. (Right-click >> delete or keyboard shortcut)

<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.7

Error message:
Invalid access to memory.

Stack trace:
(00B7F37E) TMessageForm::WMGetObject
(000B9290) ntdll.dll
(000B925F) ntdll.dll
(0006CD7E) ntdll.dll
(0007973A) ntdll.dll
(0016329C) __AfterConstruction
(00B7F35C) TMessageForm::WMGetObject
(00B7F574) TMessageForm::Dispatch
(003CA36A) Vcl::Controls::TControl::WndProc
(003CF515) Vcl::Controls::TWinControl::WndProc
(000284B2) USER32.dll
(004D36EC) Vcl::Forms::TCustomForm::WndProc
(00028B42) UXTHEME.DLL
(003CEA20) Vcl::Controls::TWinControl::MainWndProc
(00235394) System::Classes::_18364
(0003933D) USER32.dll
(00028318) USER32.dll
(00028003) USER32.dll
(00079714) ntdll.dll
(00027DBB) USER32.dll
(000332E7) USER32.dll
(00079714) ntdll.dll
(000001EA) win32u.dll
(000833DA) USER32.dll
(000C72DC) USER32.dll
(00017C7A) OLEACC.DLL
(00017B2B) OLEACC.DLL
(00017CEA) OLEACC.DLL
(00087BE2) AccEventCache.dll
(0000C41F) AccEventCache.dll
(000086ED) AccEventCache.dll
(0009281B) ntdll.dll
(0000C8F0) AccEventCache.dll
(0000C966) AccEventCache.dll
(0000D30E) AccEventCache.dll
(0000C58C) AccEventCache.dll
(0000A9B8) AccEventCache.dll
(00009833) AccEventCache.dll
(00067849) AccEventCache.dll
(0006057C) ntdll.dll
(0006028B) ntdll.dll
(0000EF3A) AccEventCache.dll
(0000F057) AccEventCache.dll
(0001D10D) AccEventCache.dll
(0001AEFE) AccEventCache.dll
(0002B9B0) AccEventCache.dll
(0006D3F8) AccEventCache.dll
(0006D4DE) AccEventCache.dll
(0002E39D) AccEventCache.dll
(0002B07E) AccEventCache.dll
(0007B2BE) AccEventCache.dll
(0006CDEE) AccEventCache.dll
(00094C59) ntdll.dll
(00050814) ntdll.dll
(0019C69C) System::Sysutils::_18218
(0019C6B1) System::Sysutils::_18218
(000386CC) UXTHEME.DLL
(00037C70) UXTHEME.DLL
(00037BFD) UXTHEME.DLL
(0009281B) ntdll.dll
(0003C1F5) ntdll.dll
(00029C19) UXTHEME.DLL
(00029C29) UXTHEME.DLL
(001696E4) System::GetMem
(0016CAA2) System::NewUnicodeString
(0018B8B2) System::Sysutils::_17008
(0018B972) System::Sysutils::_17008
(00169700) System::FreeMem
(0016CB5C) System::UStrClr
(0018C447) System::Sysutils::WideFormatBuf
(0018B594) System::Sysutils::FormatBuf
(00169700) System::FreeMem
(0016CB80) System::LStrClr
(0016CCFD) System::UStrFromPWCharLen
(0018B7AF) System::Sysutils::FmtStr
(00033AB7) USER32.dll
(000007EA) win32u.dll
(0002AEAA) UXTHEME.DLL
(0003E13C) UXTHEME.DLL
(00028EBF) UXTHEME.DLL
(0003FFDD) ntdll.dll
(0003F832) ntdll.dll
(000457AB) ntdll.dll
(00094C59) ntdll.dll
(00050814) ntdll.dll
(000607BD) ntdll.dll
(0003A6B2) UXTHEME.DLL
(000075CA) AccEventCache.dll
(00085354) AccEventCache.dll
(00085366) AccEventCache.dll
(0004C0B7) ntdll.dll
(00094C59) ntdll.dll
(0004C2CD) ntdll.dll
(0004C150) ntdll.dll
(0004A522) ntdll.dll
(0003F832) ntdll.dll
(0003CC44) ntdll.dll
(0009281B) ntdll.dll
(0003C1F5) ntdll.dll
(0008CA4E) ntdll.dll
(0006573C) ntdll.dll
%0

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.