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When I got to Status > Monitoring I get this error: Error: JSON not returned. Check to make sure you have an active session. Tried the "verify advanced options are sane" and " set ping payload size" suggestions.
Here is the crash report:

Crash report begins.  Anonymous machine information:

arm
11.0-RELEASE-p8
FreeBSD 11.0-RELEASE-p8 #0 f7e03ae750f(RELENG_2_4): Sun Apr 9 20:53:07 CDT 2017 root@buildbot2.netgate.com:/xbuilder/pfsense-crossbuild/work/obj-ufw-armv6/arm.armv6/builder/factory/tmp/FreeBSD-src/sys/pfSense-uFW

Crash report details:

PHP Errors:
[12-Apr-2017 07:31:00 America/Denver] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/20131226/rrd.so' - Shared object "libiconv.so.2" not found, required by "libglib-2.0.so.0" in Unknown on line 0
[12-Apr-2017 07:31:12 America/Denver] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/20131226/rrd.so' - Shared object "libiconv.so.2" not found, required by "libglib-2.0.so.0" in Unknown on line 0
[12-Apr-2017 07:31:22 America/Denver] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/20131226/rrd.so' - Shared object "libiconv.so.2" not found, required by "libglib-2.0.so.0" in Unknown on line 0
[12-Apr-2017 07:31:35 America/Denver] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/20131226/rrd.so' - Shared object "libiconv.so.2" not found, required by "libglib-2.0.so.0" in Unknown on line 0
[12-Apr-2017 07:32:04 America/Denver] PHP Fatal error: Call to undefined function rrd_info() in /usr/local/www/rrd_fetch_json.php on line 54
[12-Apr-2017 07:32:04 America/Denver] PHP Stack trace:
[12-Apr-2017 07:32:04 America/Denver] PHP 1. {main}() /usr/local/www/rrd_fetch_json.php:0
[12-Apr-2017 07:34:41 America/Denver] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/20131226/rrd.so' - Shared object "libiconv.so.2" not found, required by "libglib-2.0.so.0" in Unknown on line 0