npm install issue - Expected a file but found a folder

We have two artifactory pro instances, on instance A we have configured a virtual repo named npm-dev with two repositories, one called npm-local (local repo in instance A) and another remote repo ( npm local repo in instance B) . When we trying to install an npm package which exist on instance B with --registry url http://instance_A/artifactory/api/npm/npm-dev/ , we are getting following error messges :

2020-09-11 12:29:41,036 [http-nio-8081-exec-129812] [ERROR] (o.a.r.c.e.GlobalExceptionMapper:48) - Expected a file but found a folder, at: npm-local_aws:.npm/csg-react-magnetic/package.json
org.artifactory.api.repo.exception.FileExpectedException: Expected a file but found a folder, at: npm-local_aws:.npm/csg-react-magnetic/package.json
at org.artifactory.repo.HttpRepo.assertNoRedirectToFolder(HttpRepo.java:710) ~[artifactory-core-5.5.1.jar:na]
at org.artifactory.repo.HttpRepo.handleGetInfoResponse(HttpRepo.java:621) ~[artifactory-core-5.5.1.jar:na]