php warnings Failed to load "[email protected]"

[John-B]

After update, in Apache error logs a lot of warnings:

MixinLoader: Failed to load "[email protected]" for extension "uk.co.vedaconsulting.mosaico"
PHP Warning: Undefined array key "[email protected]" in ../wp-content/plugins/civicrm/civicrm/CRM/Extension/MixinLoader.php on line 74

This is PHP 8.1, Civi 5.62.1, Mosaico extensions 3.1

We send some emails with Mosaico, and some as Traditional.

EDIT -- probably this reflects CiviCRM's lack of PHP 8.1 support, though I have not confirmed that. I will leave the ticket here for reference.

[mlutfy]

I upgraded but haven't encountered this issue. Mixin warnings might happen when the core version is too old (and mixin was not included in the extension), or maybe an incorrect syntax, but it seems OK here.

Can you check that your CiviCRM install has this file :wp-content/plugins/civicrm/mixin/smarty-v2@1/mixin.php ?

[John-B]

The file is present and readable. The path is not wp-content/plugins/civicrm/mixin/smarty-v2@1/mixin.php
but wp-content/plugins/civicrm/civicrm/mixin/smarty-v2@1/mixin.php