The Hometown Update included a minor bug which caused the Daily Challenge for the 17th of October to be impossible to play. We have fixed this challenge so it is now playable again.

Re-posted patch notes from the Hometown Update for reference:

Take a trip to our hometown and build the streets of Aotearoa New Zealand’s capital city! This update to Mini Motorways includes:

• A brand new map to explore! You can now recreate our hometown of Te Whanganui-a-Tara, Aotearoa (Wellington, New Zealand) and try your hand at building an efficient road network in one of the world’s windiest cities.
  
• Autosaves! Your games will save automatically at the end of every week
  
• Several bug fixes! We’ve resolved several issues including stalling cars, crashes, and issues with some of the daily challenges.
  

We hope you enjoy exploring our local roads and visiting the city that homes Dinosaur Polo Club. Kia ora!