com.day.cq.wcm.api,version=[1.29,2) -- Cannot be resolved, org.apache.sling.api.resource,version=[2.12,3) -- Cannot be resolved, org.apache.sling.api.servlets,version=[2.3,3) -- Cannot be resolved
If the issue is still not resolved, you can try downloading the required JAR files with the same versions from https://mvnrepository.com/ and manually upload them via the OSGi System Console. This will resolve all the missing dependencies.