What happens if apu bleed fsils on no engine bleed take off?

If the Auxiliary Power Unit (APU) bleed fails during a takeoff where no engine bleed air is available, the aircraft may experience a loss of cabin pressurization and reduced performance in systems that rely on bleed air, such as air conditioning and engine starting systems. This can lead to increased workload for the flight crew, as they may need to manage cabin conditions manually. Additionally, if the aircraft requires engine bleed air for takeoff thrust augmentation, performance could be compromised, affecting safety and operational efficiency. The crew would need to assess the situation and may consider an abort or an alternate departure procedure.