Constant Crashes undefined array keys
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- This topic has 5 replies, 3 voices, and was last updated 47 minutes ago by
Anh Tran.
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December 18, 2025 at 3:30 AM #49542
[email protected]
ParticipantHi there
working intensivly with the builder I have constant crashes, probably because of this?[17-Dec-2025 20:26:04 UTC] PHP Warning: Undefined array key "relation" in /wp-content/plugins/meta-box-aio/vendor/wpmetabox/mbb-parser/src/Parsers/Base.php on line 168
What can I do
Thanks
FrançoisDecember 18, 2025 at 10:58 PM #49547Peter
ModeratorHello François,
Thanks for reaching out.
The warning error won't cause the builder to crash; it should be a fatal error or a JavaScript error. Can you please check the Console tab of the browser devtool to find the JS error or WP debug log to find the fatal error?
Also, please share a screen record of steps you take to reproduce the issue.
December 23, 2025 at 10:31 AM #49549[email protected]
ParticipantHi there,
There are no js errors but loosing db connection very often, and only when working in the builder. Then after 1-2 minutes every thing is fine again. No clue when exactly it happens. But working in the builder, especially working with group fields has many little querks. Very often the save button keeps beeing disabled after changes and I have to add another field in order to save changings. Sometimes not even that helps and I need to refresh without beeing able to save my changings. Also in this case I couldn't discover console errors. Also somemtimes moving fields from the root level in a group was not reflecting in live. I needed to delete the field and create it directly in the group.
Will tell you if I could see how to reproduce, but will be difficult.
B/R FrançoisApril 2, 2026 at 11:22 AM #49872[email protected]
ParticipantHi there
I still have constant crashes (db losses). Even though sometimes it was less extrem and sometimes I could work 20 minutes, now maybe after 10 minutes I get again problems. Before that was 5 minutes.
This time maybe after 2 or 3 minutes waiting I got a js alert 'The response is not a valid JSON response'. After clicking OK I needed to wait another 2-3 minutes till I could work again.
I recorded a short video during for the last 2 minutes of the crash showing you also all insights I have on the hosting platform. It's a VPS managed by xCloud and really have a lots of insights where we could check whats causing the problem. But I need your help for this because I cannot see anything wrong. I can also create a user for you on this platform and clone a site so you can check it directly.
Video
https://vento.so/view/9c17d68c-2691-4b77-a986-189bd3cf105e?utm_medium=shareThanks in advance
FrançoisApril 2, 2026 at 9:30 PM #49877Peter
ModeratorHello François,
When the site/builder is crashed, please check the server logs (PHP, Apache/Nginx) for any error messages in the log, screenshot https://imgur.com/eCMuZ6Z
or ask your hosting support to monitor the log for you. Then share the error messages in the log with me.
Thanks.
April 3, 2026 at 11:14 AM #49882Anh Tran
KeymasterHi Francois,
From your video I saw that the connection is lost. So I think there must be something wrong with the connection. Maybe the internet or your server. In that case when builder is sending data to save or doing something, maybe REST API request, the request is dropped or interrupt and cannot be completed, which caused the error.
In this case, I will check the debug log or the PHP error log. I'm not familiar with XCloud, so I can't tell you where to look at, but you can reach out to them to ask for where is the PHP error log.
It's best to frequently save field groups to avoid connection issues like that, especially when working with large groups.
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