An eerie silence has fallen over the Hard Rock Hotel site at 159 W. 48th St., which Extell is developing for Hard Rock International.

Work has oddly paused since plans for the 37-story project were approved by the Department of Buildings in February. A foundation is in place, but only a single security guard has been visible at the location for the past several weeks.

Extell wouldn’t comment on the record. A source said Gary Barnett’s powerful company was still in the process of finalizing a contract with a new construction manager, AECOM Tishman — although the name has been posted on the fence for months.