Webphone not working after upgrade 2.11 > 2.12

Hello all.

I did an upgrade from 2.11 to 2.12, but the webphone (WebRTC) is not working. It doesn't even display the login on Asterisk console. The user has UCP and webphone enabled. I also enabled AVPF audio stream. I have created the certificates. Still nothing. The phone icon on user panel stays yellow.

Details:

FreePBX 2.12 with all modules updated with WebRTC module installed
Centos 6.5
Asterisk 11.13
Apache 2.2
PHP 5.3.3

On freepbx_dbug log, i got this:

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): Entity: line 1: parser error : Space required after the Public Identifier

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string():

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): ^

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): Entity: line 1: parser error : SystemLiteral " or ' expected

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string():

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): ^

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): Entity: line 1: parser error : SYSTEM or PUBLIC, the URI is missing

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string():

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): ^

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): Entity: line 9: parser error : Opening and ending tag mismatch: hr line 7 and body

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string():

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): ^

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): Entity: line 9: parser error : Opening and ending tag mismatch: body line 4 and html

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string():

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): ^

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): Entity: line 10: parser error : Premature end of data in tag html line 2

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string():

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:85
[WARNING]: simplexml_load_string(): ^

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:88
[NOTICE]: Trying to get property of non-object

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:88
[NOTICE]: Trying to get property of non-object

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:88
[WARNING]: Invalid argument supplied for foreach()

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:98
[NOTICE]: Trying to get property of non-object

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:98
[NOTICE]: Trying to get property of non-object

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:98
[NOTICE]: Trying to get property of non-object

2015-Sep-07 22:07:13 /var/www/html/admin/modules/ucp/htdocs/modules/Home/Home.class.php:98
[NOTICE]: Trying to get property of non-object

I also got this line:

2015-Sep-07 22:19:45 /var/www/html/admin/modules/cxpanel/brand.php:3
failed to open stream: No such file or directory

I have installed the FreePBX disto on a VM with 2.12, the webphone works, but not here. Am i missing something obvious?

Thanks for whatever insight on this.