SharePoint - Person Group Picker - Problem 'JSON' is undefined


I have the following problem:

If I click on " Person Group Picker " control in the form by web I get warning:

This problem exist on IE 11. In Chrome in OK.

What is wrong?

January 10th, 2014 10:43am

Hi  stockDevelopers,

Is your Person/Group Picker " control  a custom InfoPath form control?

For my test, I customize a list form using InfoPath and add a  Person/Group Picker " control. Then I test it in my IE 11, but all work fine.

Is the form having embed code?

Also two settings you can have a try:

1.Open your Person/Group Picker " control in IE 11, and then press F12, and click Browser Mode, choose IE 10.

2.If your issue persists,  press ALT, and then click Tools in the Menu bar, click Compatibility View Settings, turn OFF compatibility mode for intranet sites.

A thread you can have a look:

Best Regards,


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January 20th, 2014 1:53am

What if you have more than one people picker in your form? I have a form in InfoPath on SharePoint 2013 which has two of these fields and your solution works for me on the first item, but when I go and try to enter a name in on the second people picker, I cant do anything or click on the previous people picker at all.

Has anyone else seen this?



May 8th, 2014 2:28pm

I experience the same issue. Were you able to fix your issue?
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June 8th, 2015 3:06pm

Hi If you have not solved it yet. You can try out the 2nd approach from the below article.

August 26th, 2015 12:34am

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