Notary cannot install Corda service - blockchain

Question

I was trying to configure Business network Operator services in my solution by adding the toolkit provided by r3 as corrdapp dependancy in my application.I am able to build the application but when I runnodes i am getting error for Notary
UPDATE
I am adding the log
[ERROR] 2020-09-04T14:21:15,399Z [main] internal.Node. - Unable to install Corda service com.r3.businessnetworks.membership.flows.bno.service.BNOConfigurationService - [errorCode=dfc7g6, moreInformationAt=https://errors.corda.net/OS/4.5/dfc7g6]
java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_201]
[...]
at net.corda.node.Corda.main(Corda.kt:13) ~[corda-node-4.5.jar:?]
Caused by: java.lang.NullPointerException
at com.r3.businessnetworks.membership.flows.ConfigUtils.loadConfig(ConfigUtils.kt:16) ~[?:?]
at com.r3.businessnetworks.membership.flows.bno.service.BNOConfigurationService.<init>(BNOConfigurationService.kt:21) ~[?:?]
... 33 more
[ERROR] 2020-09-04T14:21:15,458Z [main] internal.NodeStartupLogging. - Exception during node startup - [errorCode=dfc7g6, moreInformationAt=https://errors.corda.net/OS/4.5/dfc7g6]
java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_201]
[...]
at net.corda.cliutils.CordaCliWrapperKt.start(CordaCliWrapper.kt:89) ~[corda-tools-cliutils-4.5.jar:?]
at net.corda.node.Corda.main(Corda.kt:13) ~[corda-node-4.5.jar:?]
Caused by: java.lang.NullPointerException
at com.r3.businessnetworks.membership.flows.ConfigUtils.loadConfig(ConfigUtils.kt:16) ~[?:?]
at com.r3.businessnetworks.membership.flows.bno.service.BNOConfigurationService.<init>(BNOConfigurationService.kt:21) ~[?:?]
... 33 more

Answer 1

You are missing the configuration file of this CorDapp as explained here; you must:
Create a config folder inside your node's cordapps folder (i.e. node-folder/cordapps/config).
Inside that folder create a membership-service.conf file.
Inside that file add:
// Whitelist of accepted BNOs. Attempt to communicate to not whitelisted
// BNO would result into an exception
bnoWhitelist = ["O=BNO,L=New York,C=US", "O=BNO,L=London,C=GB"]
// Name of the notary to use for BNO transactions such as membership approval
notaryName = "O=Notary,L=Longon,C=GB"
The CorDapp that you're using relies on a configuration file (the above 3 steps create that file) and it causes the NullPointerException when it's missing. To understand more about CorDapp configuration files, read my article.
On a side note, according to this; the CorDapp that you're using will be deprecated on 31 September 2020.