22:12:18.436 [main] ERROR o.a.g.extension.ProviderFactory - authentication provider extension failed to start: Unable to create injector, see the following errors:

1) [Guice/MissingConstructor]: No injectable constructor for type RequestValidationService.

class RequestValidationService does not have a @Inject annotated constructor or a no-arg constructor.

Requested by:
1  : RequestValidationService.class(RequestValidationService.java:39)
     at JSONAuthenticationProviderModule.configure(JSONAuthenticationProviderModule.java:80)

Learn more:
  https://github.com/google/guice/wiki/MISSING_CONSTRUCTOR

1 error

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Full classname legend:
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JSONAuthenticationProviderModule: "org.apache.guacamole.auth.json.JSONAuthenticationProviderModule"
RequestValidationService:         "org.apache.guacamole.auth.json.RequestValidationService"
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End of classname legend:
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