Adding the "WorkThanksPref" to a scratch org definition file is preventing a scratch org from coming up. The error is:
An unknown server error occurred. Please try again. If you still see this error, contact Salesforce support for assistance. Include the information from "sfdx force:data:record:get -s ScratchOrgInfo ...
If it matters, here's the whole file:
{
"orgName": "Scratch Test",
"edition": "Enterprise",
"features": [
"AnalyticsAdminPerms",
"ContactsToMultipleAccounts",
"FieldAuditTrail",
"HealthCloudUser",
"PersonAccounts",
"PlatformConnect",
"ProcessBuilder",
"ServiceCloud",
"Workflow",
"WorkThanksPref"
]
}