2 sentences for 岔子 (chà​zi — mishap)

1. 这次演出非常重要，千万不能出任何岔子。

   zhè cì yǎn​chū fēi​cháng zhòng​yào, qiān​wàn bù néng chū rèn​hé chà​zi.

   This performance is very important; we cannot afford any hitches.

   Source: Dong Chinese Dictionary

2. 由于他的疏忽，原本万无一失的计划最终出了岔子。

   yóu​yú tā de shū hū, yuán​běn wàn​wú​yī​shī de jì​huà zuì​zhōng chū le chà​zi.

   Due to his negligence, the plan that was supposed to be foolproof ended up hitting a snag.

   Source: Dong Chinese Dictionary