# DataTables warning: table id=customDNSTable

**URL:** <https://discourse.pi-hole.net/t/datatables-warning-table-id-customdnstable/35744>\
**Category:** Community Help\
**Created:** [July 17, 2020, 4:00pm UTC](https://discourse.pi-hole.net/t/datatables-warning-table-id-customdnstable/35744 "2020-07-17T16:00:00Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![foz](https://discourse-cdn.pi-hole.net/letter_avatar_proxy/v4/letter/f/7ba0ec/32.png) [@foz](https://discourse.pi-hole.net/u/foz)\
**Post date:** [July 17, 2020, 4:00pm UTC](https://discourse.pi-hole.net/t/datatables-warning-table-id-customdnstable/35744/1 "2020-07-17T16:00:00Z")

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\*\*The issue I am facing:\*\*DataTables warning: table id=customDNSTable - Invalid JSON response. For more information about this error, please see [http://datatables.net/tn/1](http://datatables.net/tn/1)

**Details about my system:** Qnap Container - running Ubuntu 16.04 LTS (GNU/Linux 4.14.24-qnap x86\_64) - Pi-Hole

**What I have changed since installing Pi-hole:** Updated to 5.1.1 and now i have the above message please help, very new to pi-hole

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**Author:** ![yubiuser](https://discourse-cdn.pi-hole.net/user_avatar/discourse.pi-hole.net/yubiuser/32/12100_2.png) [@yubiuser](https://discourse.pi-hole.net/u/yubiuser)\
**Post date:** [July 17, 2020, 4:05pm UTC](https://discourse.pi-hole.net/t/datatables-warning-table-id-customdnstable/35744/2 "2020-07-17T16:05:37Z")

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Is this a duplicate of

> [@Bug when updating to 5.1 - Local DNS Records - DataTables warning: table id=customDNSTable - Invalid JSON response (Solved)](https://discourse.pi-hole.net/t/bug-when-updating-to-5-1-local-dns-records-datatables-warning-table-id-customdnstable-invalid-json-response-solved/35722):
>
> Expected Behaviour: Trying to access http://MY\_IP/admin/dns\_records.php And trying to Add a new domain/IP combination Actual Behaviour: Bad JSON response when trying to display the current list and failure when trying to add new records. Debug Token: [https://tricorder.pi-hole.net/3va8iewr51](https://tricorder.pi-hole.net/3va8iewr51)

You also posted there....

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**Author:** ![foz](https://discourse-cdn.pi-hole.net/letter_avatar_proxy/v4/letter/f/7ba0ec/32.png) [@foz](https://discourse.pi-hole.net/u/foz)\
**Post date:** [July 17, 2020, 7:05pm UTC](https://discourse.pi-hole.net/t/datatables-warning-table-id-customdnstable/35744/3 "2020-07-17T19:05:48Z")

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thank you for your reply, solution was to clean the browser cache, i found another post before this got authorised and posted as i am a new member. 👍

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**Author:** ![system](https://discourse.pi-hole.net/uploads/default/original/3X/7/c/7c8792f649eeb921c5d2b4c41564ffa873d9a2b8.png) [@system](https://discourse.pi-hole.net/u/system)\
**Post date:** [August 7, 2020, 7:15pm UTC](https://discourse.pi-hole.net/t/datatables-warning-table-id-customdnstable/35744/4 "2020-08-07T19:15:15Z")

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