Urgent: Critical error after adding fields to CPTs (latest version of MB)

Hi, this morning I edited a CPT record perfectly normally, then added some simple custom fields (a group with two text elements and a URL) then went back to edit the record - the website threw a critical error, and still does each time I try to view the CPT admin screen (or even use the front end!)

Please can you advise on how to investigate/resolve?

WordPress 6.1.1
PHP 8.1.13
Meta Box 5.6.12
Meta Box AIO 1.16.7

Stack trace:

Active theme: Intentionally Blank (version 3.0.3)
Current plugin: Oxygen (version 4.1.1)
PHP version 8.1.13

Error Details
=============
An error of type E_ERROR was caused in line 585 of the file /home/sites/20b/b/b592354546/public_html/mfbdev/wp-content/plugins/oxygen/component-framework/includes/metabox/oxygen-metabox-integration.php. Error message: Uncaught TypeError: array_reduce(): Argument #1 ($array) must be of type array, null given in /home/sites/20b/b/b592354546/public_html/mfbdev/wp-content/plugins/oxygen/component-framework/includes/metabox/oxygen-metabox-integration.php:585
Stack trace:
#0 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-content/plugins/oxygen/component-framework/includes/metabox/oxygen-metabox-integration.php(585): array_reduce(NULL, Array)
#1 [internal function]: OxygenMetaBoxIntegration->add_button(Array, Array)
#2 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-content/plugins/oxygen/component-framework/includes/metabox/oxygen-metabox-integration.php(108): array_reduce(Array, Array, Array)
#3 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-includes/class-wp-hook.php(308): OxygenMetaBoxIntegration->init_dynamic_data(Array)
#4 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array)
#5 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-content/plugins/oxygen/component-framework/includes/oxygen-dynamic-shortcodes.php(18): apply_filters('oxygen_custom_d...', Array)
#6 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-includes/class-wp-hook.php(308): Oxygen_VSB_Dynamic_Shortcodes->init_custom_dynamic_data(Object(WP))
#7 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)
#8 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#9 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-includes/class-wp.php(797): do_action_ref_array('wp', Array)
#10 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-includes/functions.php(1332): WP->main(Array)
#11 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-admin/includes/post.php(1245): wp(Array)
#12 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-admin/includes/class-wp-posts-list-table.php(165): wp_edit_posts_query()
#13 /home/sites/20b/b/b592354546/public_html/mfbdev/wp-admin/edit.php(235): WP_Posts_List_Table->prepare_items()
#14 {main}
thrown