Closing app Shows the error message.

WinSCP 5.15

Error message:
Error reading AnimationImages.PngImages: Out of system resources

Stack trace:
(00415337)
(00085B2F) ntdll.dll
(00073A61) ntdll.dll.KiUserExceptionDispatcher
(004FA45D)
(004FE868)
(0021CC1E)
(0021C9EC)
(003943E3)
(003934E1)
(00394897)
(003943CA)
(00393C1D)
(00393BFF)
(003A1879)
(00393C91)
(00393BD0)
(003A1879)
(0038EA76)
(003844BB)
(00385E0F)
(00385E9D)
(003A2E80)
(008CF52A) @@Animations192@Finalize
(0007A132)
(000848F7)
(000811C3)
(0088B106)
(0088D465)
(000ED3AB)
(000EDC18)
(000EDDEA)
(000EF8F0)
(000BC39B)
(000BB9D8)
(00002664)
(009242B1)
(000648EB) ntdll.dll.RtlGetAppContainerNamedObjectPath
(000648B8) ntdll.dll.RtlGetAppContainerNamedObjectPath

(00415337)

(003941EF)
(00394429)
(003934E1)
(00394897)
(003943CA)
(00393C1D)
(00393BFF)
(003A1879)
(00393C91)
(00393BD0)
(003A1879)
(0038EA76)
(003844BB)
(00385E0F)
(00385E9D)
(003A2E80)
(008CF52A) @@Animations192@Finalize
(0007A132)
(000848F7)
(000811C3)
(0088B106)
(0088D465)
(000ED3AB)
(000EDC18)
(000EDDEA)
(000EF8F0)
(000BC39B)
(000BB9D8)
(00002664)
(009242B1)
(000648EB) ntdll.dll.RtlGetAppContainerNamedObjectPath
(000648B8) ntdll.dll.RtlGetAppCon

The problem happens rarely. I cannot reproduce it.