Hello,
Thank you. I installed the development version and I got some errors such as
Fatal error: Uncaught Error: Call to a member function get_source_lang_code() on null in /home/socia979/public_html/coloursofajourney.eu/cOlJ/wp-content/plugins/meta-box-master/inc/wpml.php:97 Stack trace: #0 /home/socia979/public_html/coloursofajourney.eu/cOlJ/wp-includes/class-wp-hook.php(298): RWMB_WPML->modify_field(Array) #1 /home/socia979/public_html/coloursofajourney.eu/cOlJ/wp-includes/plugin.php(203): WP_Hook->apply_filters(Array, Array) #2 /home/socia979/public_html/coloursofajourney.eu/cOlJ/wp-content/plugins/meta-box-master/inc/meta-box.php(320): apply_filters('rwmb_normalize_...', Array) #3 /home/socia979/public_html/coloursofajourney.eu/cOlJ/wp-content/plugins/meta-box-master/inc/meta-box.php(46): RW_Meta_Box::normalize_fields(Array) #4 /home/socia979/public_html/coloursofajourney.eu/cOlJ/wp-content/plugins/meta-box-master/inc/core.php(62): RW_Meta_Box->__construct(Array) #5 /home/socia979/public_html/coloursofajourney.eu/cOlJ/wp-includes/class-wp-hook.php(298): RWMB_Core->register_meta_boxes('') #6 /home/so in /home/socia979/public_html/coloursofajourney.eu/cOlJ/wp-content/plugins/meta-box-master/inc/wpml.php on line 97
Are you sure I can use this version for a production environment?