Got it, I didn't think about cleaning cache, I thougt it was an universal problem as some days ago forum was down. Thank you all.
Next time if a particular url is inaccessible to you, try using it in the
https://www.downforeveryoneorjustme.com website. If it is not a local issue to you, it should load up fine with this site and it'd let you know. If the URL is inaccessible universally, it would tell you that too.