EnterPinActivity.class can't resolve

[fonko]

i've added compile line to a project i already have and it throws an error so i have to add it as classpath
classpath 'com.amirarcane.lock-screen:lockscreen:2.0.0'

then i've added that line to my manifest and "EnterPinActivity" is red.

not sure what i'm doing wrong, my project has two modules.

pls help!

[fonko]

Could not find com.android.support:appcompat-v7:27.1.1.
Searched in the following locations:
https://jcenter.bintray.com/com/android/support/appcompat-v7/27.1.1/appcompat-v7-27.1.1.pom
https://jcenter.bintray.com/com/android/support/appcompat-v7/27.1.1/appcompat-v7-27.1.1.jar
Required by:
project :lockscreen-usingservice > com.amirarcane.lock-screen:lockscreen:2.0.0