Question New message and Reply button don't work anymore

Hi. I can't understand what happened to my forum...
I could insert a new message or, reply to another one until two days ago. Now, if I try, I don't get any editor and box where to type displayed anymore.
Kunena is update to the latest version. I erased cache (also from my browser).
Can you help me understand what happened? Thanks.

Here it is the link to the main page of my forum:  www.waterwind.it/new/en/forum-en.html

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Kunena menu details:

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ID	Name	Menutype	Link	Path	In trash
422	Forum IT	kunenamenu	view=home&defaultmenu=422	forum-it	No
423	Indice delle categorie	kunenamenu	view=category&layout=list&catid=0	forum-it/indice-delle-categorie	No
424	Discussioni recenti	kunenamenu	view=topics&mode=replies	forum-it/recente	No
425	Nuova discussione	kunenamenu	view=topic&layout=create	forum-it/nuovadiscussione	No
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427	Mie discussioni	kunenamenu	view=topics&layout=user&mode=default	forum-it/mierecenti	No
428	Profilo	kunenamenu	view=user	forum-it/profilo	No
429	Aiuto	kunenamenu	view=misc	forum-it/aiuto	No
430	Ricerca	kunenamenu	view=search	forum-it/cerca	No
447	Forum EN	kunenamenu	view=home&defaultmenu=447	forum-en	No
448	Category index	kunenamenu	view=category&layout=list&catid=0	forum-en/category-index	No
449	Recent posts	kunenamenu	view=topics&mode=replies	forum-en/recent-posts	No
450	New post	kunenamenu	view=topic&layout=create	forum-en/new-post	No
451	Without answer	kunenamenu	view=topics&mode=noreplies	forum-en/without-answer	No
452	My posts	kunenamenu	view=topics&layout=user&mode=default	forum-en/my-posts	No
453	Profile	kunenamenu	view=user	forum-en/profile	No
454	Help	kunenamenu	view=misc	forum-en/help	No
455	Search	kunenamenu	view=search	forum-en/search	No
2135	Forum FR	kunenamenu	view=home&defaultmenu=2135	forum-fr	No
2136	Index des catégories	kunenamenu	view=category&layout=list&catid=0	forum-fr/index-des-categories	No
2137	Messages récents	kunenamenu	view=topics&mode=replies	forum-fr/messages-recents	No
2138	Nouveau poste	kunenamenu	view=topic&layout=create	forum-fr/nouveau-poste	No
2139	Sans réponse	kunenamenu	view=topics&mode=noreplies	forum-fr/sans-reponse	No
2140	Mes publications	kunenamenu	view=topics&layout=user&mode=default	forum-fr/mes-publications	No
2141	Profil	kunenamenu	view=user	forum-fr/profil	No
2142	Aidez-moi	kunenamenu	view=misc	forum-fr/aidez-moi	No
2143	Chercher	kunenamenu	view=search	forum-fr/chercher	No
3248	Forum ES	kunenamenu	view=home&defaultmenu=3248	forum-es	No
3249	Índice de categoría	kunenamenu	view=category&layout=list&catid=0	forum-es/índice-de-categoría	No
3250	Discusión recitada	kunenamenu	view=topics&mode=replies	forum-es/recente	No
3251	Nueva discusión	kunenamenu	view=topic&layout=create	forum-es/nueva-discusión	No
3252	Sin respuesta	kunenamenu	view=topics&mode=noreplies	forum-es/senzarisposte	No
3253	Mis discusiones	kunenamenu	view=topics&layout=user&mode=default	forum-es/mis-discusiones	No
3254	Perfil	kunenamenu	view=user	forum-es/perfil	No
3255	Ayudar	kunenamenu	view=misc	forum-es/ayudar	No
3256	Búsqueda	kunenamenu	view=search	forum-es/búsqueda	No

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Kunena version detailed: Kunena 5.2.6 | 2021-07-25 [ Melia ]
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Kunena - Finder Disabled
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 Kunena - Community Builder Disabled
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 Kunena - Easysocial Disabled
 Kunena - Gravatar Disabled
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| Joomla! detailed language files installed:

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Joomla! languages installed:
en-GB	English (United Kingdom)
es-ES	Spanish (español)
fr-FR	French (France)
it-IT	Italian (Italy)

Third-party components: UddeIM 4.0

Third-party SEF components: None

Plugins: Search - Kunena Search 5.2.2 | Content - Kunena Discuss 5.2.2

Modules: Kunena Latest 5.2.2 | Kunena Stats 5.2.2 | Kunena Login 5.2.2 | Kunena Search 5.2.2

I noticed that, once again, the problem must be related to a conflict with JCH optimize (as some months ago:  www.kunena.org/forum/k-5-2-support-archi...after-last-upgrading )....

If I disable JCH optimize I do not have any issue with kunena. Excluding kunena menu items, as last time, is not enough.

Excluding all Kunena menu item is only a workaround. Correctly would be, if you exclude the ckeditor.js (path: /media/kunena/core/js/ckeditor.js)
Is it not possible to exclude single files in the JCH optimize?
Alternatively, you could go back to the old BBCode editor. You find this option in the Crypsis setting (tab BBCode).