**Describe the bug** Can't log into the AdminUI after installation **To Reproduce** Steps to reproduce the behavior: 1. Install on GKE using this instructions: https://github.com/GluuFederation/flex/blob/main/docs/install/helm-install/google-gke.md 2. Configure the Helm chart with `adminUiEnabled: true` 3. Open `https://<domain>/admin` 4. See error: `The UI backend service is down` and developer tools shows `Problems getting API access token in order to process api calls.` **Expected behavior** No error **Additional context** `config-api` deployment shows: `ERROR jans.configapi.util.JwtUtil JwtUtil.java:53- Not jwt token undefined` `auth-server` deployment shows: ``` ERROR [qtp1640899500-19] [io.jans.as.model.crypto.AuthCryptoProvider] (AuthCryptoProvider.java:404) - Uninitialized keystore ERROR [qtp1640899500-19] [io.jans.as.model.crypto.AuthCryptoProvider] (AuthCryptoProvider.java:234) - Failed to find private key by kid: null, signatureAlgorithm: RS256(check whether web keys JSON in persistence corresponds to keystore file), keySelectionStrategy: OLDER ``` More information available at: https://github.com/GluuFederation/flex/issues/785