Default schema version 1.6 does not work with Teams cards using Power Automate

[nyoung30]

The default schema version of 1.6 is not compatible with Teams cards using Power Automate. Use must set schema to 1.5.

The old Designer included a target host app that would properly set the schema. The new Designer is missing this functionality.

Error message received in Teams when the card is using schema 1.6.