JERUSALEM — The United Nations praised Palestinian Authority efforts at strengthening its institutions in a report on Tuesday, describing aspects of its administration as sufficient for an independent state.

The endorsement came at a crucial time for the Palestinian Authority, which has set a September deadline for the completion of its state-building program and is working toward international recognition of Palestinian statehood in the West Bank, Gaza and East Jerusalem that month.

September is also the target date set by Israel and the Palestinians to reach a negotiated agreement for a Palestinian state, but the latest round of peace talks has been stalled for six months.

A meeting of the so-called quartet of Middle East peacemakers — the United States, the European Union, the United Nations and Russia — that was scheduled for Friday in Berlin has been canceled amid disagreements over how to proceed.