Transformation Error 'Fn::ForEach could not be resolved' when using a Mapping Default in 1.21.0

Transformation Error 'Fn::ForEach could not be resolved' when using a Mapping Default in 1.21.0: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). CloudFormation Lint Version cfn-lint 1.21.0 What operating system are you using? Fedora Describe the bug I've got a template that…