Как устранить исключение «URL-адрес Azure Key Vault имеет неверный формат»

Я клонировал проект — https://github.com/Microsoft/Partner-Center-Java-Samples/tree/master/secure-app-model/keyvault из GIT в свой локальный Eclipse.

Добавлен сервер tomcat, и когда я запускаю проект partnerconsent, я получаю это исключение

SEVERE: Exception starting filter [AuthenticationFilter]
java.lang.IllegalArgumentException: The Azure Key Vault url is malformed.
    at com.azure.security.keyvault.secrets.SecretClientBuilder.vaultUrl(SecretClientBuilder.java:177)
    at com.microsoft.store.samples.partnerconsent.security.KeyVaultProvider.getKeyVaultClient(KeyVaultProvider.java:68)
    at com.microsoft.store.samples.partnerconsent.security.KeyVaultProvider.<init>(KeyVaultProvider.java:33)
    at com.microsoft.store.samples.partnerconsent.security.AuthenticationFilter.init(AuthenticationFilter.java:236)
    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:272)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:253)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:102)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4613)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5256)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
    at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:145)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:919)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:835)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
    at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:145)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:919)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:265)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:432)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:772)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:345)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:476)
Caused by: java.net.MalformedURLException: Cannot invoke "String.length()" because "spec" is null
    at java.base/java.net.URL.<init>(URL.java:708)
    at java.base/java.net.URL.<init>(URL.java:569)
    at java.base/java.net.URL.<init>(URL.java:516)
    at com.azure.security.keyvault.secrets.SecretClientBuilder.vaultUrl(SecretClientBuilder.java:175)
    ... 36 more
Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "spec" is null
    at java.base/java.net.URL.<init>(URL.java:614)
    ... 39 more

Я добавил значение keyvault_base_url в web.xml, и оно правильно сформировано. Итак, не уверен, почему исключение все еще происходит.