XF 2.2 What is the best way to find the cause of Cannot modify container while locked error?

[dtrumbower]

Upgraded from 2.217 to 2.219 and now have this error.
I have commented out the logic for now so I can at least get into the admin screens.

What should I look for?

Thanks

 

[Paul B]

It is likely related to a third party add-on which is no longer compatible with XF.

The author will need to update it.

K

XF 2.3 Thread 'PSA: Code that runs during template rendering and modifies container values must be modified for XenForo 2.2.18+ / 2.3.9+'

Feb 6, 2026

XenForo 2.2.18 / 2.3.9 intoduce a new security mechanisam for accessing the App container.
If there is code that runs during template rendering and modifies container values, this code must be adapted.

@Chris D
This is IMHO a somewhat breaking change, might be worth to note this in the release announcement.

• Kirby
• Replies: 5
• Forum: XenForo development discussions

• 

 

[dtrumbower]

Right, but with all add ons turned off, it still happens.

 

[dtrumbower]

What would bad code look like in Edit template: PAGE_CONTAINER?