A fatal error has occured during the attempt to resize the "https://www.brillen-aus-bardowick.de/wp-content/uploads/2017/05/2017-05-05-10.54.00.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(79) "Allowed memory size of 67108864 bytes exhausted (tried to allocate 12288 bytes)" ["file"]=> string(116) "/home/k059/http/brillen-aus-bardowick.de/wp-content/plugins/fresh-framework/framework/extern/freshizer/freshizer.php" ["line"]=> int(1830) }