Critical Error using [mb_frontend_form] shortcode

When I copy/paste mb_frontend_form shortcode into a new page, it seems to be ok, and I can continue editing, as far as I don't exit from the editor..
However, if I view the page, I get critical error.
Also, when opening again the editor, I also get critical error.
Only way to edit again is disabling mb frontend edition.

From WP error log:
[24-Aug-2024 10:52:45 UTC] PHP Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "add_media_button" not found or invalid function name in /home/webfaci1/<mydomain>.com/wp-includes/class-wp-hook.php:324
Stack trace:
#0 /home/webfaci1/<mydomain>.com/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#1 /home/webfaci1/<mydomain>.com/wp-includes/plugin.php(517): WP_Hook->do_action()
#2 /home/webfaci1/<mydomain>.com/wp-includes/class-wp-editor.php(238): do_action()
#3 /home/webfaci1/<mydomain>.com/wp-includes/general-template.php(3826): _WP_Editors::editor()
#4 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box/inc/fields/wysiwyg.php(47): wp_editor()
#5 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box/inc/field.php(544): RWMB_Wysiwyg_Field::html()
#6 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box/inc/field.php(36): RWMB_Field::call()
#7 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box/inc/field.php(544): RWMB_Field::show()
#8 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-frontend-submission/templates/post/content.php(20): RWMB_Field::call()
#9 /home/webfaci1/<mydomain>.com/wp-includes/template.php(812): require('/home/webfaci1/...')
#10 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box-aio/vendor/gamajo/template-loader/class-gamajo-template-loader.php(255): load_template()
#11 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box-aio/vendor/gamajo/template-loader/class-gamajo-template-loader.php(118): Gamajo_Template_Loader->locate_template()
#12 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-frontend-submission/src/Post.php(50): Gamajo_Template_Loader->get_template_part()
#13 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-frontend-submission/src/Form.php(87): MBFS\Post->render()
#14 /home/webfaci1/<mydomain>.com/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-frontend-submission/src/Shortcode.php(36): MBFS\Form->render()
#15 /home/webfaci1/<mydomain>.com/wp-includes/shortcodes.php(434): MBFS\Shortcode->shortcode()
#16 [internal function]: do_shortcode_tag()
#17 /home/webfaci1/<mydomain>.com/wp-includes/shortcodes.php(273): preg_replace_callback()
#18 /home/webfaci1/<mydomain>.com/wp-includes/class-wp-hook.php(324): do_shortcode()
#19 /home/webfaci1/<mydomain>.com/wp-includes/plugin.php(205): WP_Hook->apply_filters()
#20 /home/webfaci1/<mydomain>.com/wp-includes/blocks/post-content.php(50): apply_filters()
#21 /home/webfaci1/<mydomain>.com/wp-includes/class-wp-block.php(519): render_block_core_post_content()
#22 /home/webfaci1/<mydomain>.com/wp-includes/class-wp-block.php(499): WP_Block->render()
#23 /home/webfaci1/<mydomain>.com/wp-includes/blocks.php(2061): WP_Block->render()
#24 /home/webfaci1/<mydomain>.com/wp-includes/blocks.php(2113): render_block()
#25 /home/webfaci1/<mydomain>.com/wp-includes/block-template.php(260): do_blocks()
#26 /home/webfaci1/<mydomain>.com/wp-includes/template-canvas.php(12): get_the_block_template_html()
#27 /home/webfaci1/<mydomain>.com/wp-includes/template-loader.php(106): include('/home/webfaci1/...')
#28 /home/webfaci1/<mydomain>.com/wp-blog-header.php(19): require_once('/home/webfaci1/...')
#29 /home/webfaci1/<mydomain>.com/index.php(17): require('/home/webfaci1/...')
#30 {main}
thrown in /home/webfaci1/<mydomain>.com/wp-includes/class-wp-hook.php on line 324