Hi,
Tested on J!5 and J!6, JCE 2.9.99.3
I can't merge cells : the modal is showing but i get these console error on applying.
Uncaught TypeError: can't access property "merge", grid is undefined
onsubmit https://api.oxalis-scop.fr/media/com_jce/editor/tinymce/plugins/table/plugin.js?7a269a83b6d060a0d47864129f5700ca=1&context=19&profile_id=6:678
open https://api.oxalis-scop.fr/media/com_jce/editor/tinymce/tinymce.js?a511745fc23e193ad93b63c79a9dfad9:11057
executeHandlers https://api.oxalis-scop.fr/media/com_jce/editor/tinymce/tinymce.js?a511745fc23e193ad93b63c79a9dfad9:2858
defaultNativeHandler https://api.oxalis-scop.fr/media/com_jce/editor/tinymce/tinymce.js?a511745fc23e193ad93b63c79a9dfad9:2868 