[APM] Unable to import index pattern after upgrading to 7.0

[sorenlouv]

It is no longer possible to import index pattern in 7.0 via Getting Started Guide.

When clicking "Load Kibana Objects" an error occurs and the status text says:
Request failed, Error: Bad Request.

The xhr request to api/saved_objects/_bulk_create?overwrite=false fails with a 400 and the following error message:

{
  "statusCode": 400,
  "error": "Bad Request",
  "message": "\"value\" at position 0 fails because [child \"version\" fails because [\"version\" must be a string]]. \"value\" does not contain 1 required value(s)",
  "validation": { "source": "payload", "keys": ["0.version", "value"] }
}

Regression introduced in: #29906

[elasticmachine]

Pinging @elastic/apm-ui