After an already rickety launch, “Solo: A Star Wars Story” took a nose-dive at the box office in its second week in theaters, earning just $29.3 million domestically. The 66 percent drop-off is a poor omen for coming “Star Wars” films and an additional sign that the film might have been rolled out too quickly after “Star Wars: The Last Jedi.”

“Solo” still took No. 1 at the box office in a quiet week, and now has amassed $264.2 million globally, according to comScore, which compiles box-office data. But Disney and Lucasfilm still have a huge hill to climb to reach the $400 million price tag of making and marketing the movie worldwide. Ticket sales for “Solo” pale next to those of the last three “Star Wars” films: For comparison, “Rogue One,” another stand-alone installment, made $96 million in its second week in 2016.

The results may make Disney reconsider its ambitious “Star Wars” rollout strategy over the next few years, with at least nine more films in the works. “Solo” came out just five months after “The Last Jedi,” whereas previous installments had always arrived with at least a year’s worth of space.

The film also continues an underwhelming string of box-office performances for the director Ron Howard. This is his fifth domestic flop in a row, following “In the Heart of the Sea,” “Rush,” “The Dilemma” and “Inferno.” But Mr. Howard was brought on just a year ago to salvage the project after Philip Lord and Christopher Miller, the directors behind “The Lego Movie,” were ousted; “Solo” was roiled in turmoil for much of its production.