A fatal error has occured during the attempt to resize the "https://stwilfridssheffield.co.uk/wp-content/uploads/2018/09/prayer-week.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 40960 bytes)" ["file"]=> string(104) "/home/stwilfrids/public_html/wp-content/plugins/fresh-framework/framework/extern/freshizer/freshizer.php" ["line"]=> int(1846) }