I am trying to set up automation that links new issues to an existing issue. This seems like it should be straightforward, but I get this error:

Rule set up:

Things I have tried based on various support articles:
- ensured the rule actor has permissions to browse the project and link issues
- ensured the linked issue field is present/visible on the edit screens of both issue types being linked
I've also tried using examples for Additional Fields:
{
"update":{
"issuelinks":[
{
"add":{
"type":{
"name":"Relates",
},
"outwardIssue":{
"key":"SOC2-662"
}
}
}
]
}
}
Appreciate any guidance!!