Can't install FreePBX 13

Any chance you can give me a little help determining why the FreePBX 13 installer is:

Unable to connect to Asterisk Manager from /var/lib/asterisk/bin/retrieve_conf, aborting in file /var/lib/asterisk/bin/retrieve_conf on line 13

when Asterisk is definitely running and was verified as such at the beginning of the FreePBX installer:

STARTING ASTERISK
Asterisk Started
Assuming you are Database Root
Checking if SELinux is enabled…Its not (good)!
No /etc/asterisk/asterisk.conf file detected. Installing…Writing /etc/asterisk/asterisk.conf…Done
Checking if Asterisk is running and we can talk to it as the ‘asterisk’ user…Done
Preliminary checks done. Starting FreePBX Installation