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DataTables warning: table id=list – Invalid JSON response. For more information about this error, please see http://datatables.net/tn/1

I was about to validate a new user (me). Logged in as admin and wen to users. As I clicked on Users, this error appeared.

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[updated: 11 Jun 2021]
MacOS: 10.15.7  (Catalina)
Safari   14.0.3;  Firefox 89.0
PHP 7.4 FastCGI

Alter-Drukarsh connections... 3.3.8 <private>
The Royals 3.3.8<royals.rbcsolutions.ca>
The Gerrer Rebbes 3.3.8 <royals.rbcsolutions.ca/index.php?ged=rebbes>

Oh dear – I dread seeing this error message.

It is almost always caused by an incorrectly formatted piece of data attached to one user’s details. But to find it you need to know your way quite well around using FireBug or whatever browser “developer tool” (usually F12 on your keyboard) you have.

If you can do that, then you can find the details of the json code that is failing. Then the error usually shows quite clearly.

Without that knowledge it will be pure guesswork.

Nigel
My personal kiwitrees site is www.our-families.info

Can I assume it’s associated with the new user account I just created?

Given that I was creating account just to test where password request is done (my brother gave me cause for concern), I will delete account. I have one pending new user to approve. If she submits requested information and I validate her, will see if that error occurs again.

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[updated: 11 Jun 2021]
MacOS: 10.15.7  (Catalina)
Safari   14.0.3;  Firefox 89.0
PHP 7.4 FastCGI

Alter-Drukarsh connections... 3.3.8 <private>
The Royals 3.3.8<royals.rbcsolutions.ca>
The Gerrer Rebbes 3.3.8 <royals.rbcsolutions.ca/index.php?ged=rebbes>

macalter wrote:

Can I assume it’s associated with the new user account I just created?

That seems likely, but we can’t be certain. It depends how often you visit the users table and therefore whether the error might have been there for some time.

Let me know if you find a repeatable cause.

Nigel
My personal kiwitrees site is www.our-families.info