Please help, plugin not working anymore

Hi
Today I encountered with plugin not working anymore.
On my all new pages I created , inserted pages doesnt show up. I tried to purge cache from browser but inserted post and pages doesnt show up anymore.
My old pages (with inserted post)are still showing up correctly inserted post, but new ones doesnt work.
Only action I have done before plugin stopped working is I wanted to delete /blog/ slug in permalink structure on network setup site. I have done that, after it I updated permalink cache.
Please help, any info would be helpful , thanks !