Missing method Take in assembly /usr/lib/keepass2/Plugins/KeeChallenge.dll

[memoefix]

Hello,

I get the following error :
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Missing method Take in assembly /usr/lib/keepass2/Plugins/KeeChallenge.dll, type System.Linq.Enumerable
System.IO.FileNotFoundException: Could not load file or assembly 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies.
File name: 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
at KeeChallenge.KeyCreation.OnClosing (System.Object o, System.Windows.Forms.FormClosingEventArgs e) [0x00000] in :0
at System.Windows.Forms.Form.OnFormClosing (System.Windows.Forms.FormClosingEventArgs e) [0x00000] in :0
at System.Windows.Forms.Form.FireClosingEvents (CloseReason reason, Boolean cancel) [0x00000] in :0
at System.Windows.Forms.Form.RaiseCloseEvents (Boolean last_check, Boolean cancel) [0x00000] in :0
at System.Windows.Forms.Form.set_DialogResult (DialogResult value) [0x00000] in :0
at (wrapper remoting-invoke-with-check) System.Windows.Forms.Form:set_DialogResult (System.Windows.Forms.DialogResult)
at System.Windows.Forms.Button.OnClick (System.EventArgs e) [0x00000] in :0
at System.Windows.Forms.ButtonBase.OnMouseUp (System.Windows.Forms.MouseEventArgs mevent) [0x00000] in :0
at System.Windows.Forms.Button.OnMouseUp (System.Windows.Forms.MouseEventArgs mevent) [0x00000] in :0
at System.Windows.Forms.Control.WmLButtonUp (System.Windows.Forms.Message& m) [0x00000] in :0
at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x00000] in :0
at System.Windows.Forms.ButtonBase.WndProc (System.Windows.Forms.Message& m) [0x00000] in :0
at System.Windows.Forms.Button.WndProc (System.Windows.Forms.Message& m) [0x00000] in :0
at System.Windows.Forms.Control+ControlWindowTarget.OnMessage (System.Windows.Forms.Message& m) [0x00000] in :0
at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x00000] in :0
at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr wParam, IntPtr lParam) [0x00000] in :0
Missing method Take in assembly /usr/lib/keepass2/Plugins/KeeChallenge.dll, type System.Linq.Enumerable
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$ lsb_release -a
Distributor ID: Debian
Description: Debian GNU/Linux 8.10 (jessie)
Release: 8.10
Codename: jessie

Product: Yubikey 4 OTP+U2F+CCID
idVendor 0x1050 Yubico.com
idProduct 0x0407

How can I fix it ?

Thank you for your help.

memoefix

[memoefix]

additional information :

$ grep libykpers-1-1 /usr/lib/keepass2/Plugins/KeeChallenge.dll.config

$ locate libykpers-1.so.1
/usr/lib/x86_64-linux-gnu/libykpers-1.so.1
/usr/lib/x86_64-linux-gnu/libykpers-1.so.1.17.3

$ ll /usr/lib/keepass2/Plugins
total 52
557396 -rw-r--r-- 1 root root 119 avril 26 14:44 KeeChallenge.dll.config
557394 -rw-r--r-- 1 root root 30208 avril 26 14:44 KeeChallenge.dll
557384 drwxr-xr-x 2 root root 4096 avril 26 14:44 64bit/
557374 drwxr-xr-x 2 root root 4096 avril 26 14:44 32bit/
557344 drwxr-xr-x 3 root root 4096 avril 26 14:44 ../
557372 drwxr-xr-x 4 root root 4096 avril 26 14:44 ./