"Mark Forums Read" = Invalid Security Token

[Kavadas]

Currently running 3.8.5.

Whenever I hit "Mark Forums Read" I get the following error:

Your submission could not be processed because a security token was invalid.

If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error.

I have the following products installed:

1. AME 2.5.4
2. Change Posts Owner 1.8.0
3. Cyb - Advanced Registration 1.7
4. Cyb PM System Enhancements 1.8
5. Default User Text Formatting 1.0
6. DownloadsII 5.1.2
7. Dragonbyte Tech: (vBShout Lite) 5.2.3
8. Easy Forms 3.6
9. Live Topic 1.07b
10. Mark Thread As 'Solved' 1.1.2
11. No Logout For Banned Users 1.10
12. Photo Popup 3.5
13. Quick User Management 3.8.001
14. Similar Thread Check v2 2.0
15. Template Modification System 1.1.5
16. vBAdvanced CMPS 3.2.2
17. vBCode Table 0.1.7.1

Edit: I found this thread but replacing that code didn't help the issue any.