Create an associations works on one Hubspot instance but not on another (Beta) instance.

[KLeong]

I have two hubspot accounts. One for developement and one for production. This production instance has the 'new and improved associations avalaible:https://knowledge.hubspot.com/crm-setup/associations-enhancements-beta

But If I want to to a POST this works fine for developement

{"status":"COMPLETE","results":[{"from":{"id":"19XXX"},"to":{"id":"70400XXXXX"},"type":"contact_to_company"},{"from":{"id":"70400XXXXX"},"to":{"id":"19XXX"},"type":"company_to_contact"}],"startedAt":"2021-09-30T19:53:21.772Z","completedAt":"2021-09-30T19:53:21.800Z"}

but not for the production setup. The error is this:

{"status":"error","message":"internal error","correlationId":"b1b9618a-399a-4bef-bc28-fa947d4c09c3"}

I use the follow curl command. With different and exciting  ID's and APIKEY

curl --request POST \
--url 'https://api.hubapi.com/crm/v3/associations/CONTACTS/COMPANIES/batch/create?hapikey=XXXXXXXXXXXX' \
--header 'content-type: application/json' \
--data '{
"inputs": [
{
"from": {
"id": "XXXXX"
},
"to": {
"id": "XXXXXX"
},
"type": "contact_to_company"
}
]
}'

Can the BETA version be the cause of the error? If So, how to fix? 

[KLeong]

Hello Dennis,

Great,

Will this be a v4 version?  If so, will there also be a new version of the Hubspot-Python-API?

[dennisedson]

@KLeong 

There are some new endpoints for the beta.  Will be on this page

There was a bug on the page so it is behind a password.  Should be ungated soon so keep checking that page.