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It seems in your file build.gradle of your module app dependence com.android.support:support-annotations declared more than once and with different versions. Apparently, you have this dependency with the version 26.1.0 and 17.1.1. Just check which version of yours compileSdkVersion. If it’s 27, then change all versions of the dependencies com.android.support to 27, otherwise change to the version you find.
If you prefer, post the code of your build.gradle here to analyze.

From the message it looks like you have conflicting dependency versions. Check that they have not been declared more than once or that the installed versions are in accordance with the project.
– ronssm
what would these conflicting dependencies be? could you explain to me?
– bruno afonso