A fatal error has occured during the attempt to resize the "http://mhrsp.org/wp-content/uploads/2018/03/people-practicing-thai-chi-in-park-P76YSVY.jpg" image.
Possible causes and their solutions (in the order of occurence) are:
/wp-content/uploads/freshizer/
directory does not exist on your webserver.
array(4) { ["type"]=> int(1) ["message"]=> string(80) "Allowed memory size of 268435456 bytes exhausted (tried to allocate 36864 bytes)" ["file"]=> string(95) "/home/www/mhrsp.org/wp-content/plugins/fresh-framework/framework/extern/freshizer/freshizer.php" ["line"]=> int(1846) }