Hey there,
I am really sorry for the delay of this reply as it is a weekend for us here.
It seems like you provided those Cpanel login access no longer work when i try to login from the Cpanel login page, you can check my attached screenshot below.
By the way, can you try change to this cron command and see if you still getting that error response?
[gist type="php"]
/usr/bin/wget -O /dev/null "
http://yoursite.com/index.php?option=com_easyblog&cron=1"
[/gist]
Note : Remember replace this
http://yoursite.com to your current site domain name.