The Flex Editor currently allows you to declare an integer data type of any bit value such as int1 or uint1 and the Flex file will save without error. However, Code Gen output will fail to compile unless the bit value is a power of 2. If you run into any issues, please check your Flex code and ensure only int8, int16, int32, and int64 are defined (as well as uint8, uint16, uint32, and uint64).
For supported values see: https://docs.tangramflex.io/docs/flex/overview#types