Gradle Failed about ud851-exercises HOT 2 OPEN

Please assist with inputs on this issue.

Gradle sync failed: No cached version of org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.2.71 available for offline mode.

From Build tab:

Could not resolve com.google.jimfs:jimfs:1.1.
Required by:
project : > com.android.tools.build:gradle:3.2.1 > com.android.tools.build:builder:3.2.1 > com.android.tools:sdklib:26.2.1 > com.android.tools:repository:26.2.1
> No cached version of com.google.jimfs:jimfs:1.1 available for offline mode.
> No cached version of com.google.jimfs:jimfs:1.1 available for offline mode.

from ud851-exercises.

It's is due to because these repo's are to old so his gradle version's are also to old they gives some problem in gradle error
for resolving this you can make a new Project and copy the whole java and XML file's ...if there is any dependencies do not copy it
search for latest one at google and then add them in your projects

from ud851-exercises.