While creating "github push trigger" with openshift pipeline getting error of "name field is unknown"

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55019433
https://console-openshift-console.apps.sandbox-m2.ll9k.p1.openshiftapps.com/topology/ns/nageshrathodiot-dev
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Hi,
I want to create end to end pipeline on openshift sandbox for my application.
The following steps followed while creating pipeline & trigger:

1. Login to developers perspective in openshift sandbox.
2. from +Add option selected the import from git.
3. added the repo link : https://github.com/redhat-developer-demos/react-openshift-example.git
4. checked the pipeline option & added the port as 3000.
5. Pipeline ran successfully & deployed the app in sandbox.
6. when tried to create a the "GitHub push trigger" that time it unable to create it & throwing the error of "unknown field name" (check the attached snapshot)