This is now fixed in the source code repository so it will be fixed in the next release. The new fix does not require the jquery migrate plugin, but as a workaround until the next release you could edit the file /Dialog/FileManagerDialog.aspx to make it load the migrate plugin
<portal:ScriptLoader ID="ScriptInclude" runat="server" IncludeQtFile="true" CombineScriptsWithScriptManager="false" IncludeJQueryMigrate="true" />
Best,
Joe