NPE when obtaining ConfigValue via getValue

[mabartos]

I'm getting NullPointerException when I'm trying to obtain ConfigValue by getValue(...).

ConfigValue for the property is found, but the value inside is null, so it's impossible to process the config value properly.

Caused by: java.lang.NullPointerException: Cannot invoke "String.indexOf(String)" because "value" is null
        at io.smallrye.config.ExpressionConfigSourceInterceptor.escapeDollarIfExists(ExpressionConfigSourceInterceptor.java:85)
        at io.smallrye.config.ExpressionConfigSourceInterceptor.getValue(ExpressionConfigSourceInterceptor.java:57)
        at io.smallrye.config.ExpressionConfigSourceInterceptor.getValue(ExpressionConfigSourceInterceptor.java:38)
        at io.smallrye.config.SmallRyeConfigSourceInterceptorContext.proceed(SmallRyeConfigSourceInterceptorContext.java:20)
        at io.smallrye.config.FallbackConfigSourceInterceptor.getValue(FallbackConfigSourceInterceptor.java:24)
        at io.smallrye.config.SmallRyeConfigSourceInterceptorContext.proceed(SmallRyeConfigSourceInterceptorContext.java:20)
        at io.smallrye.config.PropertyNamesConfigSourceInterceptor.getValue(PropertyNamesConfigSourceInterceptor.java:17)
        at io.smallrye.config.SmallRyeConfigSourceInterceptorContext.proceed(SmallRyeConfigSourceInterceptorContext.java:20)
        at io.smallrye.config.SmallRyeConfig.getConfigValue(SmallRyeConfig.java:323)
        at org.keycloak.quarkus.runtime.configuration.Configuration.getConfigValue(Configuration.java:85)

@radcortez Could you please check it? Thanks