The problem is the same in different web browsers (firefox, chrome, eplorer, edge etc..) including my my android telephone.
Thanks Mihai
You are right
After reactivating NextGen pictures uploaded by WordPress standard tool Block/Gallery/picture went corrupt.
When I deactivate NextGen all nextGen uploaded pictures disappear and the other pictures are still corrupt.
I have also checked the Lightbox. It only applied to NextGen
Thank you Gabyimegely
I have deactivated all plugins. The problem persists
How do I purge any endurance cache on my side?
