Avant Gardner, owners of the indoor-outdoor concert complex including the Brooklyn Mirage in East Williamsburg, filed for Chapter 11 bankruptcy Monday.

The company’s troubles became evident when the Mirage failed to open in early May. Avant Gardner had redesigned the 6,200-person venue, but city inspectors didn’t approve the new structure.

Avant Gardner also operates the Great Hall and Kings Hall at the same complex, and both locations will continue hosting shows during the bankruptcy process , the company said.

“The decision to file for Chapter 11 relief follows several months of financial distress, culminating with Avant Gardner being unable to open its newly constructed Mirage event space,” Avant Gardner said in an Instagram post.

In its bankruptcy filings, Avant Gardner li

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