nbltnow

I actually just ran into this error. I confirmed it’s happening on a brand new installation of WordPress with the only plugins installed and activated being ACF and MailPoet.

Steps to reproduce:

1) New WordPress 6.8.1 install
2) Install and activate Mailpoet 5.12.7
3) Install and activate Advanced Custom Fields 6.4.2
4) Create a Field Group in ACF
5) Attempt to set the Location Rules to “Show this field group if [Post Template]”

It will result in the following error:

Fatal error: Uncaught Error: Object of class WP_Block_Template could not be converted to string in /wp-includes/formatting.php:1096

Stack trace:
#0 /wp-includes/formatting.php(4664): wp_check_invalid_utf8(Object(WP_Block_Template))
#1 /wp-content/plugins/advanced-custom-fields/includes/acf-input-functions.php(451): esc_html(Object(WP_Block_Template))
#2 /wp-content/plugins/advanced-custom-fields/includes/acf-input-functions.php(436): acf_walk_select_input(Array, Array, 1)
#3 /wp-content/plugins/advanced-custom-fields/includes/acf-input-functions.php(402): acf_walk_select_input(Array, Array)
#4 /wp-content/plugins/advanced-custom-fields/includes/acf-input-functions.php(382): acf_get_select_input(Array)
#5 /wp-content/plugins/advanced-custom-fields/includes/fields/class-acf-field-select.php(319): acf_select_input(Array)
#6 /wp-includes/class-wp-hook.php(324): acf_field_select->render_field(Array)
#7 /wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#8 /wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#9 /wp-content/plugins/advanced-custom-fields/includes/acf-hook-functions.php(113): do_action_ref_array('acf/render_fiel…', Array)
#10 /wp-includes/class-wp-hook.php(324): _acf_apply_hook_variations(Array)
#11 /wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#12 /wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#13 /wp-content/plugins/advanced-custom-fields/includes/acf-field-functions.php(807): do_action('acf/render_fiel…', Array)
#14 /wp-content/plugins/advanced-custom-fields/includes/admin/views/acf-field-group/location-rule.php(65): acf_render_field(Array)
#15 /wp-content/plugins/advanced-custom-fields/includes/api/api-helpers.php(350): include('/Users/…')
#16 /wp-content/plugins/advanced-custom-fields/includes/admin/views/acf-field-group/location-group.php(18): acf_get_view('/Users/…', Array)
#17 /wp-content/plugins/advanced-custom-fields/includes/api/api-helpers.php(350): include('/Users/…')
#18 /wp-content/plugins/advanced-custom-fields/includes/admin/views/acf-field-group/locations.php(25): acf_get_view('/Users/…', Array)
#19 /wp-content/plugins/advanced-custom-fields/includes/api/api-helpers.php(350): include('/Users/…')
#20 /wp-content/plugins/advanced-custom-fields/includes/admin/views/acf-field-group/options.php(74): acf_get_view('/Users/…')
#21 /wp-content/plugins/advanced-custom-fields/includes/api/api-helpers.php(350): include('/Users/…')
#22 /wp-content/plugins/advanced-custom-fields/includes/admin/post-types/admin-field-group.php(435): acf_get_view('/Users/…')
#23 /wp-admin/includes/template.php(1456): acf_admin_field_group->mb_options(Object(WP_Post), Array)
#24 /wp-admin/edit-form-advanced.php(721): do_meta_boxes(Object(WP_Screen), 'normal', Object(WP_Post))
#25 /wp-admin/post.php(206): require('/Users/…')
#26 /server.php(167): require('/Users/…')
#27 {main} thrown in /wp-includes/formatting.php on line 1096

Only stuff I cleaned up in that stack trace was removing the first part of home directory path and my server path.

Once I deactivate MailPoet, I can refresh the Field Group view and it loads correctly.

• This reply was modified 10 months, 3 weeks ago by nbltnow.