Reload failed because retrieve_conf encountered an error: 255

FreePBX 13.0.188.9

On a fresh install, I deleted the DADHI trunk and successfully applied the change.

Then I went to Asterisk Logfile Settings, set Log Queues=No, deleted the console and full log definitions, and then clicked Submit. Upon clicking Apply Config, I got the following errors:

Reload failed because retrieve_conf encountered an error: 255
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1 error(s) occurred, you should view the notification log on the dashboard or main screen to check for more details.

Reload failed because retrieve_conf encountered an error: 255
exit: 255
Unable to continue. implode(): Invalid arguments passed in /var/www/html/admin/modules/logfiles/functions.inc.php on line 215
#0 [internal function]: Whoops\Run->handleError(2, 'implode(): Inva...', '/var/www/html/a...', 215, Array)
#1 /var/www/html/admin/modules/logfiles/functions.inc.php(215): implode(',', NULL)
#2 /var/www/html/admin/libraries/BMO/DialplanHooks.class.php(95): logfiles_get_config('asterisk')
#3 /var/lib/asterisk/bin/retrieve_conf(866): FreePBX\DialplanHooks->processHooks('asterisk', Array)
#4

Critical Errors found

Please check for errors in the notification section

retrieve_conf failed, config not applied

Reload failed because retrieve_conf encountered an error: 255

No amount of retries or reboots will allow Apply Config to succeed (the same errors are repeated).

/etc/asterisk/asterisk.conf and /etc/freepbx.conf and amportal.conf exist.

Disabling the Asterisk Logfiles modules eliminates the error, but as soon as the module is re-enabled, the problem returns.