App crashes because of Destination service error

Hello,

I am trying to use a destination for an MTA app on SAP Cloudfoundry environment. The destination is created under the Subaccount and looks like this -

The app crashes when Authentication of the destination is set to AppToAppSSO or OAuth2ClientCredentials.

ERR VError: service-destinations/authentication: No enum match for: "AppToAppSSO"

Here is a preview of the crash log -

2019-01-16T20:56:40.59+0530 [APP/PROC/WEB/0] OUT #2.0#2019 01 16 15:26:40:595#+00:00#INFO#/approuter################PLAIN##Application router version 5.7.0#
2019-01-16T20:56:40.59+0530 [APP/PROC/WEB/0] OUT #2.0#2019 01 16 15:26:40:598#+00:00#INFO#/Configuration################PLAIN##Using empty destinations to run#
2019-01-16T20:56:40.60+0530 [APP/PROC/WEB/0] OUT #2.0#2019 01 16 15:26:40:606#+00:00#INFO#/Destination service################PLAIN##Looking for the missing environment destinations metadata: generictile in destination service#
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR /home/vcap/app/node_modules/@sap/approuter/lib/utils/JsonValidator.js:30
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     throw new VError('%s%s: %s',
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     ^
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR VError: service-destinations/authentication: No enum match for: "AppToAppSSO"
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at JsonValidator.validate (/home/vcap/app/node_modules/@sap/approuter/lib/utils/JsonValidator.js:30:11)
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at /home/vcap/app/node_modules/@sap/approuter/lib/configuration/validators.js:156:19
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at Array.forEach (native)
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at Object.validateDestinations (/home/vcap/app/node_modules/@sap/approuter/lib/configuration/validators.js:154:18)
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at Object.attachDestinationServiceConfig (/home/vcap/app/node_modules/@sap/approuter/lib/utils/destination-utils.js:44:16)
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at Object.exports.loadConfiguration (/home/vcap/app/node_modules/@sap/approuter/lib/configuration/app-config.js:23:22)
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at Object.module.exports.load (/home/vcap/app/node_modules/@sap/approuter/lib/configuration.js:19:34)
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at bootstrap (/home/vcap/app/node_modules/@sap/approuter/lib/bootstrap.js:52:36)
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at Approuter.start (/home/vcap/app/node_modules/@sap/approuter/approuter.js:67:13)
2019-01-16T20:56:40.77+0530 [APP/PROC/WEB/0] ERR     at Object.<anonymous> (/home/vcap/app/node_modules/@sap/approuter/approuter.js:144:6)
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! Linux 4.15.0-39-generic
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! argv "/home/vcap/deps/0/node/bin/node" "/home/vcap/deps/0/bin/npm" "start"
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! node v6.14.4
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! npm  v3.10.10
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! code ELIFECYCLE
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! ui5@0.0.1 start: `node node_modules/@sap/approuter/approuter.js`
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! Exit status 1
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! 
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! Failed at the ui5@0.0.1 start script 'node node_modules/@sap/approuter/approuter.js'.
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! Make sure you have the latest version of node.js and npm installed.
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! If you do, this is most likely a problem with the ui5 package,
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! not with npm itself.
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! Tell the author that this fails on your system:
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR!     node node_modules/@sap/approuter/approuter.js
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! You can get information on how to open an issue for this project with:
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR!     npm bugs ui5
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! Or if that isn't available, you can get their info via:
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR!     npm owner ls ui5
2019-01-16T20:56:40.78+0530 [APP/PROC/WEB/0] ERR npm ERR! There is likely additional logging output above.
2019-01-16T20:56:40.79+0530 [APP/PROC/WEB/0] ERR npm ERR! Please include the following file with any support request:
2019-01-16T20:56:40.79+0530 [APP/PROC/WEB/0] ERR npm ERR!     /home/vcap/app/npm-debug.log
2019-01-16T20:56:40.80+0530 [APP/PROC/WEB/0] OUT Exit status 1

Why is it happening? Are these authentication methods not supported?

If the Authentication property is set to NoAuthentication, the app starts.

Thanks.