When I use QGIS at work and have an Open Street Map layer, I get the Layer Error "Access denied: Forbidden." The Layer actually works ok, until I zoom in enough, and the prompt "OpenStreetMap: Access Denied: Forbidden" never leaves. We're a small team at work and so don't have an IT team or anyone to turn to among the staff to diagnose the issue. I know it's an issue with the ISP blocking the URL or putting restrictions on the domain, but I don't know what exactly is being blocked.
Has anyone had this issue before and know what exactly to say to our ISP?