Hello,
Thanks for contacting us.
1) Contact your hosting provider about this – https://gyazo.com/935ff52cde35ebfd99088b5c6eec0087 They should be able to fix it.
2) There is a known issue of the Massive Addons plugin that caused by server limits – https://codecanyon.net/item/massive-addons-for-visual-composer/14429839/comments?page=36&filter=all#comment_14143143 https://codecanyon.net/item/massive-addons-for-visual-composer/14429839/comments?filter=all&page=79#comment_18501820
You need to contact the hosting provider and ask to increase the maximum body length value.
Regards