[Bug 56100] New: Greenshot: Error when adding a textbox

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56100

Bug ID: 56100
           Summary: Greenshot: Error when adding a textbox
           Product: Wine
           Version: 9.0-rc1
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 75775
  --> https://bugs.winehq.org/attachment.cgi?id=75775
Error content

Steps to reproduce:
1) unpack Greenshot-NO-INSTALLER-1.2.10.6-RELEASE.zip
2) wine Greenshot.exe
3) RMB on Greenshot icon in the system tray
4) LMB on "Capture region"
5) Draw a rectangle on your screen
6) A context menu will pop up by itself
7) Choose "Open in image editor"
9) Press 'T' on your keyboard to invoke "Add textbox" from object's menu

Behavior:
Error window with content as attached.

Expected behavior:
No error window.

Additional info:
1) No error window with dotnet-4.8
2) Tested on WINEARCH=win64
3) Tested on wine-staging