I put my files in /wso2am-2.6.0/repository/deployment/server/synapse-configs/default/api then send request and I got the below error
<ams:fault xmlns:ams="http://wso2.org/apimanager/security">
<ams:code>900900</ams:code>
<ams:message>Unclassified Authentication Failure</ams:message>
<ams:description>Error while accessing backend services for API key validation</ams:description>
</ams:fault>
and wso2carbon.log as get error message as below
TID: [-1234] [] [2023-03-06 09:40:59,122] ERROR {org.wso2.carbon.apimgt.gateway.handlers.security.APIAuthenticationHandler} - API authentication failure due to Unclassified Authentication Failure {org.wso2.carbon.apimgt.gateway.handlers.security.APIAuthenticationHandler}
org.wso2.carbon.apimgt.gateway.handlers.security.APISecurityException: Error while accessing backend services for API key validation
at org.wso2.carbon.apimgt.gateway.handlers.security.keys.WSAPIKeyDataStore.getAllURITemplates(WSAPIKeyDataStore.java:77)
at org.wso2.carbon.apimgt.gateway.handlers.security.APIKeyValidator.getAllURITemplates(APIKeyValidator.java:791)
at org.wso2.carbon.apimgt.gateway.handlers.security.APIKeyValidator.doGetAPIInfo(APIKeyValidator.java:639)
at org.wso2.carbon.apimgt.gateway.handlers.security.APIKeyValidator.findMatchingVerb(APIKeyValidator.java:573)
at org.wso2.carbon.apimgt.gateway.handlers.security.APIKeyValidator.getResourceAuthenticationScheme(APIKeyValidator.java:357)
at org.wso2.carbon.apimgt.gateway.handlers.security.oauth.OAuthAuthenticator.authenticate(OAuthAuthenticator.java:127)
at org.wso2.carbon.apimgt.gateway.handlers.security.APIAuthenticationHandler.isAuthenticate(APIAuthenticationHandler.java:210)
at org.wso2.carbon.apimgt.gateway.handlers.security.APIAuthenticationHandler.handleRequest(APIAuthenticationHandler.java:158)
at org.apache.synapse.rest.API.process(API.java:325)
at org.apache.synapse.rest.RESTRequestHandler.apiProcessNonDefaultStrategy(RESTRequestHandler.java:149)
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:95)
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:71)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:303)
at org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:92)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:415)
at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:151)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.wso2.carbon.apimgt.gateway.handlers.security.APISecurityException: Error while accessing backend services for API key validation
at org.wso2.carbon.apimgt.gateway.handlers.security.keys.APIKeyValidatorClient.getAllURITemplates(APIKeyValidatorClient.java:189)
at org.wso2.carbon.apimgt.gateway.handlers.security.keys.WSAPIKeyDataStore.getAllURITemplates(WSAPIKeyDataStore.java:75)
... 20 more
Caused by: java.lang.NullPointerException
at org.wso2.carbon.apimgt.gateway.handlers.security.keys.APIKeyValidatorClient.getAllURITemplates(APIKeyValidatorClient.java:183)
... 21 more
Anyone hit the same problem, and what's the root cause of this error?