Hello, I'm a beginner. Please help. AS 3.1.4., Sdk...

# android

[jurajsolarml]

Hello, I'm a beginner. Please help. AS 3.1.4., SdkVersion 27, kotlin_version = '1.2.70'.I'm writing a mistake:: Type mismatch: inferred type is Int but Toolbar? was expected. How do I fix it? Thank You