Error code 130 appears as “Failed to load web page (unknown error)” when the built-in browser inside the Steam client cannot load a page, such as the Store or Community pages. The code comes from Chromium, the browser engine Steam embeds: Steam's minus 130 is Chromium's ERR_PROXY_CONNECTION_FAILED, which means something on the PC is routing the browser through a proxy that is not answering. The rest of Steam usually keeps working, since only the web pages are affected.
ipconfig /flushdns, then restart Steam.netsh winsock reset, then restart the PC.If the error only happens on one network, such as a school or workplace network, the proxy or filter there is the cause, and Steam's pages will not load until that network allows them. If the same pages load in a regular browser but not in Steam, the problem is inside Steam's own browser data, so repeat the cache and cookie clear.
Can I still play games with error 130? Yes. Error 130 only affects Steam's built-in web pages, like the Store and Community. The library and installed games keep working.
Why do Steam pages fail when my browser works? Steam uses its own embedded browser with its own cache and proxy handling, so a bad proxy setting or corrupt Steam cache can break Steam pages while a regular browser works fine.