Solved Dropdown button and quick reply

I have an issue with dropdown buttons with Crypsis template.
If I enable "Show default actions" option (buttons grouped in a group) the dropdown arrow and the button itself don't work. If I click on them nothing happens.
User menu doesn't show either.

Another issue: if I set quick reply with default, the global scrollbar disappears.

I attach my configuration report.

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Kunena menu details:

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ID	Name	Menutype	Link	Path	In trash
124	Forum	mainmenu	view=home&defaultmenu=125	forum	No
125	Indice delle categorie	mainmenu	view=category&layout=list&catid=0	forum/categorie	No
126	Discussioni recenti	mainmenu	view=topics&mode=replies	forum/recente	No
127	Nuova discussione	mainmenu	view=topic&layout=create	forum/nuovadiscussione	No
128	Senza risposta	mainmenu	view=topics&mode=noreplies	forum/senzarisposte	No
129	Mie discussioni	mainmenu	view=topics&layout=user&mode=default	forum/mierecenti	No
130	Profilo	mainmenu	view=user	forum/profilo	No
131	Aiuto	mainmenu	view=misc	forum/aiuto	No
132	Ricerca	mainmenu	view=search	forum/cerca	No
199	The League	mainmenu	view=category&catid=40	the-league	No
133	Forum	mainmenu	Itemid=189	kunena-2013-10-24	Yes
189	Forum	kunenamenu	view=home&defaultmenu=190	kunena	No
190	Indice delle categorie	kunenamenu	view=category&layout=list	kunena/home	No
191	Discussioni recenti	kunenamenu	view=topics&mode=replies	kunena/recente	No
192	Nuova discussione	kunenamenu	view=topic&layout=create	kunena/nuovadiscussione	No
193	Senza risposta	kunenamenu	view=topics&mode=noreplies	kunena/senzarisposte	No
194	Mie discussioni	kunenamenu	view=topics&layout=user&mode=default	kunena/mierecenti	No
195	Profilo	kunenamenu	view=user	kunena/profilo	No
196	Aiuto	kunenamenu	view=misc	kunena/aiuto	No
197	Ricerca	kunenamenu	view=search	kunena/cerca	No

Joomla default template details : protostar | author: Kyle Ledbetter | version: 1.0 | creationdate: 4/30/2012

Kunena default template details : Crypsis | author: Kunena Team | version: 5.0.3 | creationdate: 2016-10-23

Kunena version detailed: Kunena 5.0.3 | 2016-10-23 [ Dibatag ]
| Kunena detailed configuration:

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Kunena config settings:
board_offline	0
enablerss	1
threads_per_page	20
messages_per_page	25
messages_per_page_search	20
showhistory	1
historylimit	6
shownew	1
disemoticons	0
template	crypsis
showannouncement	1
avataroncat	0
catimagepath	category_images
showchildcaticon	1
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	1
askemail	0
showemail	0
showuserstats	1
showkarma	1
useredit	1
useredittime	0
useredittimegrace	600
editmarkup	1
allowsubscriptions	1
subscriptionschecked	0
allowfavorites	1
maxsubject	50
maxsig	300
regonly	0
pubwrite	0
floodprotection	0
mailmod	0
mailadmin	0
captcha	0
mailfull	1
allowavatarupload	1
allowavatargallery	1
avatarquality	65
avatarsize	2048
imageheight	1200
imagewidth	1920
imagesize	512
filetypes	txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2,7z,rar
filesize	512
showranking	1
rankimages	1
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_posts	1
userlist_karma	1
userlist_email	0
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	1
latestcategory	0
showstats	1
showwhoisonline	1
showgenstats	1
showpopuserstats	1
popusercount	5
showpopsubjectstats	1
popsubjectcount	5
showspoilertag	1
showvideotag	1
showebaytag	1
trimlongurls	0
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	1
ebaylanguagecode	it-it
sessiontimeout	1800
highlightcode	0
rss_type	topic
rss_timelimit	month
rss_limit	100
rss_included_categories
rss_excluded_categories
rss_specification	rss2.0
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rss_cache	900
defaultpage	categories
default_sort	asc
sef	1
showimgforguest	1
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pollenabled	1
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	50
ordering_system	replyid
post_dateformat	datetime_today
post_dateformat_hover	datetime
hide_ip	1
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	50
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	1
debug	0
catsautosubscribed	0
showbannedreason	0
showthankyou	1
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popthankscount	5
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	1
lightbox	1
show_list_time	8760
show_session_type	0
show_session_starttime	0
userlist_allowed	0
userlist_count_users	1
enable_threaded_layouts	0
category_subscriptions	post
topic_subscriptions	first
pubprofile	1
thankyou_max	10
email_recipient_count	0
email_recipient_privacy	bcc
captcha_post_limit	0
image_upload	registered
file_upload	registered
topic_layout	flat
time_to_create_page	1
show_imgfiles_manage_profile	1
hold_newusers_posts	0
hold_guest_posts	0
attachment_limit	8
pickup_category	0
article_display	intro
send_emails	1
fallback_english	1
cache	1
cache_time	60
iptracking	1
rss_feedburner_url
autolink	1
access_component	0
statslink_allowed	1
superadmin_userlist	0
legacy_urls	1
attachment_protection	0
categoryicons	1
avatarresizemethod	1
avatarcrop	0
user_report	1
searchtime	365
teaser	0
ebay_language	101
twitter_consumer_key
twitter_consumer_secret
allow_change_subject	1
max_links	6
read_only	0
ratingenabled	0
url_subject_topic	0
log_moderation	0
attach_start	0
attach_end	14
google_map_api_key
attachment_utf8	1
autoembedsoundcloud	1
emailheader	/media/kunena/email/hero-wide.png
user_status	1
keywords	0
userkeywords	0
userlist_name	1
usernamechange	0
version_check	1

| Kunena integration settings:

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Kunena - AlphaUserPoints Disabled
Kunena - AltaUserPoints Disabled
Kunena - Community Builder Enabled: access=0 login=1 activity=0 avatar=1 profile=1 private=0
Kunena - Easyblog Disabled
Kunena - Easyprofile Disabled
Kunena - Easysocial Disabled
Kunena - Gravatar Disabled
Kunena - JomSocial Disabled
Kunena - Joomla Enabled: access=1 login=0
Kunena - Kunena Enabled: avatar=0 profile=0
Kunena - UddeIM Enabled: private=1

| Joomla! detailed language files installed:

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Joomla! languages installed:
it-IT	Italian (IT)
en-GB	English (en-GB)

Third-party components: CommunityBuilder 2.0.15+build.2016.10.20.01.58.15.24cb212fa | UddeIM 3.9

Third-party SEF components: None

Plugins: Search - Kunena Search 5.0.1 | Content - Kunena Discuss 5.0.1

Modules: Kunena Latest 5.0.1

I have the scroll bar issue as well. I have had to set the quick reply to always show.

I think the issue is with Bootstrap.
I solved using the one provided by Joomla (i.e. disabling loading of Bootstrap CSS in Crypsis template).