Squirrel Loggen config problem

To all,
Please excuse me if this has been asked and answered; I have been unable
to find it any of my searches.  I have at least two plugin problems; the
other will be asked separately.

I am running:
squirrelmail-1.4.22-15.el7.noarch
php-5.4.16-36.el7_1.x86_64
httpd-2.4.6-31.el7.centos.x86_64
dovecot-2.2.10-4.el7_0.1.x86_64
sendmail-8.14.7-4.el7.x86_64

as well as:
compatability-2.0.16-1.0
squirrel_logger-2.3.1-1.2.7

from .tar.gz files.

I have followed the instructions in the INSTALL document included in the
plugin package, and yet (even with the default options) I get the
following error using configtest.php:

    ERROR: Squirrel Logger plugin is configured to log the "ERROR" event
in $sl_logs, but that event is not enabled in $sl_log_events

Ideally, I would have the errors logged, to a file, but even though the
$sl_logs and $sl_log_events match I get the error above.  Any thoughts
on how I might resolve this?

-- 
 -Don

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