the untimely death of 34-year-old Dance Gavin Dance bassist Tim Feerick, an official told The Post on Friday.The rocker was found dead Wednesday of unknown causes at a modest apartment complex known as “The Retreat” on the city’s east side, according to records from the coroner’s office in Sacramento, Calif.Members of the post-hardcore screamo band announced Feerick’s passing on social media Thursday, prompting an outpouring of grief from dedicated fans.A small crowd of friends and band devotees gathered at the city’s Afterburner mural Thursday night to light candles and blast Dance Gavin Dance tunes on a portable speaker in Feerick’s honor, footage shows.Others mourned from afar.“Lighting [a candle] all the way from Scotland tonight. Been a fan of DGD since early 2014, Tim is and forever will be my inspiration as a bassist,” one fan wrote on Twitter.