Import/Export client or realm settings causes java.lang.RuntimeException: Script upload is disabled

Issue

• The deprecation of upload_scripts feature prevents Import/Export Authorization Settings from any openid-connect client with the following exception:

ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-7) Uncaught server error: java.lang.RuntimeException: Script upload is disabled
    at org.keycloak.authorization.policy.provider.js.JSPolicyProviderFactory.updatePolicy(JSPolicyProviderFactory.java:125)
    at org.keycloak.authorization.policy.provider.js.JSPolicyProviderFactory.onImport(JSPolicyProviderFactory.java:70)
    at org.keycloak.models.utils.RepresentationToModel.toModel(RepresentationToModel.java:2185)
    at org.keycloak.models.utils.RepresentationToModel.importPolicies(RepresentationToModel.java:2113)
    at org.keycloak.models.utils.RepresentationToModel.toModel(RepresentationToModel.java:2059)
    at org.keycloak.authorization.admin.ResourceServerService.importSettings(ResourceServerService.java:136)

• We need to be able to export client configuration data from one RH-SSO instance and import it to another instance.

• Exporting and then importing realm in RH-SSO fails with following error

ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-3) Uncaught server error: java.lang.RuntimeException: Script upload is disabled
        at org.keycloak.keycloak-authz-policy-common@18.0.0.redhat-00001//org.keycloak.authorization.policy.provider.js.JSPolicyProviderFactory.throwCanNotUpdatePolicy(JSPolicyProviderFactory.java:130)
        at org.keycloak.keycloak-authz-policy-common@18.0.0.redhat-00001//org.keycloak.authorization.policy.provider.js.JSPolicyProviderFactory.onImport(JSPolicyProviderFactory.java:72)
        at org.keycloak.keycloak-server-spi-private@18.0.0.redhat-00001//org.keycloak.models.utils.RepresentationToModel.toModel(RepresentationToModel.java:2483)
        at org.keycloak.keycloak-server-spi-private@18.0.0.redhat-00001//org.keycloak.authorization.AuthorizationProvider$3.create(AuthorizationProvider.java:351)
        at org.keycloak.keycloak-server-spi-private@18.0.0.redhat-00001//org.keycloak.models.utils.RepresentationToModel.importPolicies(RepresentationToModel.java:2405)
        at org.keycloak.keycloak-server-spi-private@18.0.0.redhat-00001//org.keycloak.models.utils.RepresentationToModel.toModel(RepresentationToModel.java:2353)
        at org.keycloak.keycloak-server-spi-private@18.0.0.redhat-00001//org.keycloak.models.utils.RepresentationToModel.importAuthorizationSettings(RepresentationToModel.java:2300)
        at org.keycloak.keycloak-server-spi-private@18.0.0.redhat-00001//org.keycloak.models.utils.RepresentationToModel.lambda$importRealmAuthorizationSettings$9(RepresentationToModel.java:2278)
        at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
        at org.keycloak.keycloak-server-spi-private@18.0.0.redhat-00001//org.keycloak.models.utils.RepresentationToModel.importRealmAuthorizationSettings(RepresentationToModel.java:2276)