Logstash 7.10 Error

I' ve installed last version of Logstash and gives me this error for ingested pipelines:

[ERROR][logstash.outputs.elasticsearch][main][....] Encountered a retryable error. Will Retry with exponential backoff {:code=>403, :url=>"https://x.x.x.x:9200/_bulk"}

Any ideea why ?

Thanks!

See this post for suggestions.

I've seen it, but I don't know which is the problem here because with Elastic Stack 7.9 everything was fine.