Doesn′t work with wp 3.7.1 & Jetpack 2.5 carousel gallery

Hello, only on iOS I have these error-messages:
1.) Warning: Illegal string offset ‘fancybox’ in …/wp-content/plugins/photoswipe-for-nextgen-gallery/ngg-photoswipe.php on line 41

2.) Warning: Cannot modify header information – headers already sent by (output started at …/wp-content/plugins/photoswipe-for-nextgen-gallery/ngg-photoswipe.php:41) in …/wp-includes/pluggable.php on line 899

Error 1.) will be displayed always https://bit.ly/1ggqM0R

Error 2.) will be displayed only, if I want to open posts with a jetpack carousel gallery and shows me just these 2 errors: https://cl.ly/image/0k0y3p2S3P0k

Any ideas?

https://www.ads-software.com/plugins/photoswipe-for-nextgen-gallery/