Elasticsearch get rid of yellow status

I tried to delete kibana_1 index as stated in the previuos elastic log:

(Cluster health status changed from [RED] to [YELLOW] (reason: [shards started [[.kibana_1] ) :

so i ran:

DELETE /.kibana_1

and i received a success message.

Then i have green status in elastic but kibana dont work anymore, i see in the kibana log:

{"type":"log","@timestamp":"2021-01-14T10:38:19Z","tags":["info","savedobjects- 
service"],"pid":4704,"message":"Waiting until all Elasticsearch nodes are compatible with Kibana 
before starting saved objects migrations..."}
{"type":"log","@timestamp":"2021-01-14T10:38:19Z","tags":["info","savedobjects- 
service"],"pid":4704,"message":"Starting saved objects migrations"}
{"type":"log","@timestamp":"2021-01-14T10:38:49Z","tags":["warning","savedobjects- 
service"],"pid":4704,"message":"Unable to connect to Elasticsearch. Error: Request Timeout 
after 30000ms"}

Can anyone help me?
Thanks