Illegal string offset... Fatal error: Cannot unset string offsets in .../router.php when creating announcement in event

Hello

trying to create an announcement in an event :
http://awesomescreenshot.com/00c5c9ni75

i have this error when submitting :
http://awesomescreenshot.com/0ff5c9p4aa

Warning: Illegal string offset 'ssl' in /home/xxxx/administrator/components/com_easysocial/includes/router/router.php on line 119
Warning: Illegal string offset 'tokenize' in /home/xxxx/administrator/components/com_easysocial/includes/router/router.php on line 120
.......
.......
Fatal error: Cannot unset string offsets in /home/xxxx/administrator/components/com_easysocial/includes/router/router.php on line 221


Thanks in advance for your help

Loïc

nota : this morning router.php have been modified : http://stackideas.com/forums/1-3-1-4-3-fr-fr-error-404-for-dashboard-element,-apps,-activity-log,-search,-conversation,-followers,-friends