When your in the RasPBX, do you see similar errors? The deprecated functions probably aren’t a big deal, according to Deprecated Function PHP warning, but the very first line that says “connection attempt to AMI failed” is a major problem.
Check out this thread: [RESOLVED] FreePBX cannot connect to Asterisk via AMI, you might need to follow it and try resetting the password inside of mysql to match whatever you have in /etc/manager.conf