I have installed and configured 3.8 on ubuntu . I also installed BBB ver 2.2.6 on another VM on ubuntu 16 ( as mentioned in the documentation of BBB).
I am facing 2 main issues.
1) i am able to do the testing with directly going to bigblue button server.but not able to access from moodle BBB plugin. when i click join session . it opens a new tab but closes it quickly. i did some debugging and found that the bbb_ajax.php is not called .below are the lines from the calls of working vs not working .
working (test serer)
"GET
/innolearn/pluginfile.php/1/mod_bigbluebuttonbn/presentationdefault/80d02edd92b0ed0168b13c378aa07335/VC%20Home%20Page.pdf
HTTP/1.1" 200 122476 "-" "Mozilla"
"GET
/innolearn/pluginfile.php/1/mod_bigbluebuttonbn/presentationdefault/80d02edd92b0ed0168b13c378aa07335/VC%20Home%20Page.pdf
HTTP/1.1" 200 122476 "-" "Apache-HttpAsyncClient/4.1.4
(Java/1.8.0_252)"
"GET
/innolearn/mod/bigbluebuttonbn/bbb_view.php?action=join&id=26&bn=12
HTTP/1.1" 302 682
"http://35.247.138.181/innolearn/mod/bigbluebuttonbn/view.php?id=26"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:77.0) Gecko/20100101
Firefox/77.0"
"GET
/innolearn/mod/bigbluebuttonbn/bbb_ajax.php?sesskey=W0MEEZkZCC&action=meeting_info&id=9042be9334d7e11b5a88d7585e8ca65890ac5b0b-10-12&bigbluebuttonbn=12&updatecache=true&callback=YUI.Env.DataSource.callbacks.yui_3_17_2_1_1591282032880_53
HTTP/1.1" 200 1176
"http://35.247.138.181/innolearn/mod/bigbluebuttonbn/view.php?id=26"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:77.0) Gecko/20100101
Firefox/77.0"
Not working (my configured server)
"GET /innolearn/pluginfile.php/1/mod_bigbluebuttonbn/presentationdefault/7a2ea3d81d296a71eb58f058b8589ac9/VC%20Home%20Page.pdf HTTP/1.1" 200 122476 "-" "Mozilla"
"GET /innolearn/pluginfile.php/1/mod_bigbluebuttonbn/presentationdefault/7a2ea3d81d296a71eb58f058b8589ac9/VC%20Home%20Page.pdf HTTP/1.1" 200 122476 "-" "Apache-HttpAsyncClient/4.1.3 (Java/1.8.0_252)"
"GET /innolearn/mod/bigbluebuttonbn/bbb_view.php?action=join&id=22&bn=8 HTTP/1.1" 302 660 "http://35.247.138.181/innolearn/mod/bigbluebuttonbn/view.php?id=22" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:77.0) Gecko/20100101 Firefox/77.0
2) microphone is needing to enabke ssl.