Hello,
Please disable all your plugins except visual composer, clear cache and reset cdn files if you use it. This should fix it if it’s a plugin conflict. If the problem is still there, then please increase the parameters from system status by following this guide: https://forum.tagdiv.com/system-status-parameters-guide/
Let us know how it goes.
Thank you!
@Bogdan – I have the same problem since I just installed Newspaper 6.6.5 and VC 4.9.2 on my test domain.
The display looks OK, but VC backend doesn’t work.
I deactivated all other plugins and I have the System Parameters set. (see below)
The VC Block that shows up on existing designed pages looks like a rounded button, with no edit or properties.
(I hovered over one so you can see it in this screenshot)

Theme name Newspaper
Theme version 6.6.5
Theme database version 6.6.5
Server software Apache
PHP Version 5.4.33
post_max_size 32M
max_execution_time 300
max_input_vars 5000
SUHOSIN installed false
WP version 4.4.2
WP Memory Limit 64 MB/request
WP_DEBUG False
@both
Please send us an email at contact@tagdiv.com and provide wp-admin so we can inspect this issue directly. Also include a link to this website so we can identify you.
Thank you!