I just installed Smith Cart 5.6.8 into DNN 7.1.1 (new install).  Immediately after, when I go to Add New Page from the Pages menu logged in as Host the Parent Page setting dropdown does not populate with the page structure.  It just times out with a javascript error "'children.length' is null or not an object" from /resources/shared/components/dropdownlist/dnn.dropdownlist.js.  This did not happen prior to the Smith Cart installation and I was able to see the page tree in the dropdown.  Is there a fix for this?  This will be a showstopper for us if not.

Thanks, Kevin.  DNN7.1.2 resolved the issue.

Well, I thought it resolved it but here's what I experienced when I upgraded our production DNN.  I had not installed the new module on production yet after discovering the issue on our staging server.  So when I upgraded production to 7.1.2 and THEN installed the new Smith Cart module the problem was not resolved even with 7.1.2.  It's as though the SC module steps on something in DNN.  Upgrading to 7.1.2 fixed what SC stepped on but having installed it after 7.1.2 upgrade, it stepped on it again.  And now I'm at the latest upgrade.  Too much time has elapsed to roll back to 7.1.1 because we would lose form data, etc. that has come in since then.

Could you identify possibly a DNN jQuery function for that dropdown box that might be getting over-written when SC is installed and could the original DNN function be restored again after the fact?

Thanks, Kevin.

Yes, when the dropdown box is opened and does not display the tree:

 

1.                                   Uncaught TypeError: Cannot read property 'length' of undefined dnn.dropdownlist.js?cdv=110:588

1.                                                      TreeNodeConverter.castNode dnn.dropdownlist.js?cdv=110:588

2.                                                      DynamicTreeViewController._onGetTree     dnn.dropdownlist.js?cdv=110:694

3.                                                      b.isFunction.i       jquery.js:7223

4.                                                      c      jquery.js:7341

5.                                                      p.fireWith    jquery.js:7403

6.                                                      k      jquery.js:9597

7.                                                      r      jquery.js:9597

Hi Kevin.  Have you found a way to resolve this?  We are past a point where we can restore from a backup or we would lose too much data in other areas. There are not really any good workarounds when this tree dropdown is not available. 
Regards,
Clark

Thanks, Kevin.  DNN versions 7.2 and 7.2.1 are now available so we upgraded to 7.2.1 and this again corrected the issue.  Apparently the Smith Cart installation over-writes something in the DNN install and upgrading re-writes it back.

Hi Clark,

Great news! The solution to this issue is to copy the Newtonsoft.Json.dll from the DNN install package, into the \bin folder on your server.

Thanks for reporting the issue!

Always happy to help!