Can't update roles due to nonce check

Heya, I’m getting the “Wrong nonce. Action prohibitied.” everytime I try to update role editor with the latest version of URE. This is effectively preventing me to do anything with the editor unless I remove the check from the code.

Also, the editor isn’t refreshing at all, for example, when I try to select roles from the role dropdown, checkboxes aren’t getting updated. I’m getting few JavaScript-errors from the editor page:

User agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729;
Media Center PC 6.0; InfoPath.3; .NET4.0C; .NET4.0E)
Timestamp: Fri, 17 May 2013 10:44:49 UTC

Message: Identifier needed
Line: 137
Character: 48
Code: 0
URL: ../wp-content/plugins/user-role-editor/js/ure-js.js?ver=3.5.1

Message: An object must given as value
Line: 247
Character: 1
Code: 0
URL: ../wp-admin/users.php?page=user-role-editor.php

I’m not using IE8 willingly (work etc. ?? But anyhow, I’m guessing all these are related to the browser from the stone age since the actual editor isn’t working right. I’ve tried to re-install URE with no result.

https://www.ads-software.com/extend/plugins/user-role-editor/