XenForo Error when modifying message user info elements

[the1]

Hi,

I am trying to add additional elements to be displayed on each post such as the registration date and the total number of messages, however, when I select these fields I receive the following error message:

Oops! We ran into some problems.
Oops! We ran into some problems. Please try again later. More error details may be in the browser console.
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As far as I can tell, there is no error in the logs.

I'm not sure what is happening.

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