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[Resolved] 500 error when adding existing field to Field Group

This thread is resolved. Here is a description of the problem and solution.

Problem:
We are not able to add (already used) Fields to Custom Field Groups. It results in an E500 Error.

Solution:
It could be that your server is missing the mb_string module, as required by Toolset:
https://toolset.com/toolset-requirements/

This support ticket is created 4 years, 7 months ago. There's a good chance that you are reading advice that it now obsolete.

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This topic contains 2 replies, has 2 voices.

Last updated by rashmiS 4 years, 7 months ago.

Assisted by: Beda.

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#1581547
Screen Shot 2020-04-10 at 4.37.17 PM.png

I am trying to: add an existing field to a field group

Link to a page where the issue can be seen: hidden link

I expected to see: Existing fields

Instead, I got: throws a 500 error

#1582033

I can add existing Custom Fields to other Groups just fine on my tests. It might hence be a compatibility issue, or maybe you have many (a lot) of fields in the Group.

Can you try with another Theme, and no other plugins but Toolset?
If then the issue persists, please also check if https://codex.wordpress.org/WP_DEBUG lists any error when activated.

In case you can't find any reason and the issue persist, please create a duplicate (https://toolset.com/faq/provide-supporters-copy-site/) of the site before reactivating all plugins and Theme, and send that to me so I can test. It might be a server issue due to some module not activated (mb_string, or else), I can then test this locally.

Thanks!

#1585569

I didn't have the mbstring PHP plugin enabled. Thanks for the tip.