Backport of UI/ Fix version check typo into release/1.10.x (#14380)

* backport of commit ee7f9abcf82d15b758df6481a1ba8beb705a8419

* backport of commit a4144747cfb8c30bd2714fdf54d78c05e88f508a

* backport of commit aa1164f33c562041d9d6d4639ca4a077240e8403
Co-authored-by: Claire Bontempo <cbontempo@hashicorp.com>

ui/app/routes/vault/cluster.js

@@ -40,7 +40,7 @@ export default Route.extend(ModelBoundaryRoute, ClusterRoute, {
     const currentTokenName = this.auth.get('currentTokenName');
     // if no namespace queryParam and user authenticated,
     // use user's root namespace to redirect to properly param'd url
-    if (this.featureFlagService.managedNamespaceRoot && this.version.isOss) {
+    if (this.featureFlagService.managedNamespaceRoot && this.version.isOSS) {
       console.error('Cannot use Cloud Admin Namespace flag with OSS Vault');
     }
     if (!namespace && currentTokenName && !Ember.testing) {