Why did the last play Bruno and Gretel performed with grandmother end in disaster?

The last play Bruno and Gretel performed with their grandmother ended in disaster because of a series of miscommunications and unexpected events. Their grandmother, who had taken on a pivotal role, struggled to remember her lines, leading to confusion on stage. Additionally, technical issues with the props and scenery caused chaos, ultimately resulting in an unscripted and chaotic finale that left the audience bewildered. This combination of factors turned what was meant to be a joyful performance into a memorable disaster.