Could not find any version that matches com.android.support:design:29.+.

Unable to resolve dependency for ':app@debug/compileClasspath': Could not find any version that matches com.android.support:design:29.+.

 

参考博文https://blog.csdn.net/u012748494/article/details/94970783

把sdk改为特定的版本，更新后即可。