CircleCI version rolled back to 1.0, builds fail

Starting a couple of days back, I see that all commits are built with CircleCI 1.0, workflows are not considered (all branches build instead of just one) and generally all builds fail with

A problem occurred configuring project ‘:app’.

You have not accepted the license agreements of the following SDK components:
[Android SDK Build-Tools 26.0.1, Android SDK Platform 26].

No changes to .circleci/config.yml on my side.
Could you please assist to fix the build process?

Fixed now.