Error code 310 appears as “Failed to load web page (unknown error)” when the built-in browser inside the Steam client cannot finish loading a page. The code comes from Chromium, the browser engine Steam embeds: Steam's minus 310 is Chromium's ERR_TOO_MANY_REDIRECTS, which means the request kept bouncing between addresses and never landed. A corrupt web browser cache or stale cookies are the usual cause, and the library and installed games are normally unaffected.
ipconfig /flushdns, then restart Steam.If the error only affects one page, such as the Market, try the same page in a regular browser at the Steam website. If it loads there, the problem is inside Steam's browser data, so repeat the cache and cookie clear. If it fails in the browser too, the page or service itself is having trouble, and waiting is the fix.
Is error 310 the same as error 130? No, although both show the same message. Error 130 is a proxy connection failure, while error 310 is too many redirects, usually from corrupt browser data. The fixes overlap but start in different places.
Does error 310 mean my account is blocked? No. It is a page loading problem in Steam's built-in browser, not an account problem. Account blocks show up as sign-in or access messages, not page load codes.