The ```Map maximum zoom``` in the plugin ```zp_openstreetmap``` is ```18```?
I set the value to 18 a few days ago. Today I put him at 22. Then I forgot and suddenly there were only gray tiles. Now I needed a lot of time until I found the mistake.
What are you asking exactly? With *gray titles* you mean tiles? It might happen that map tiles are not available sometimes due to less server capacity (depends on what tiles you use).
