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    Expert tip

    Take a look at this blog post on how to set up Grid2 https://goo.gl/rxzbE6. A user related (in the email group on the source) that using older selenium libs solves this exception.

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via Atlassian JIRA by Mark Lassau [Atlassian], 1 year ago
via Atlassian JIRA by Mark Lassau [Atlassian], 1 year ago
via Atlassian JIRA by Chris Fuller, 1 year ago
via Atlassian JIRA by Chris Fuller, 1 year ago
via hatenablog.com by Unknown author, 1 year ago
via GitHub by dan-da
, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:187)	at com.google.common.collect.SingletonImmutableList.(SingletonImmutableList.java:41)	at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:270)	at com.atlassian.jira.customfieldhelper.api.InspectionMessageParameter.(InspectionMessageParameter.java:28)	at com.atlassian.jira.customfieldhelper.api.InspectionMessageBuilder.addPlainParameter(InspectionMessageBuilder.java:83)	at com.atlassian.jira.customfieldhelper.impl.inspector.field.FieldConfigurationInspector.createOkDetails(FieldConfigurationInspector.java:74)	at com.atlassian.jira.customfieldhelper.impl.inspector.field.FieldConfigurationInspector.createOk(FieldConfigurationInspector.java:66)	at com.atlassian.jira.customfieldhelper.impl.inspector.field.FieldConfigurationInspector.inspect(FieldConfigurationInspector.java:60)	at com.atlassian.jira.customfieldhelper.impl.inspector.field.FieldConfigurationInspector.inspect(FieldConfigurationInspector.java:23)	at com.atlassian.jira.customfieldhelper.rest.FieldInfoResource.runInspection(FieldInfoResource.java:120)	at com.atlassian.jira.customfieldhelper.rest.FieldInfoResource.getInfo(FieldInfoResource.java:104)