Problems logging into elastic

I enter the correct username and password and it gives me the output 'we couldn't log you in'.
How can I solve it?
Please help me....

Welcome!

It's probably not the right username and password.
But if you don't remember, may be use elasticsearch-reset-password | Elasticsearch Guide [8.15] | Elastic

HTH

Hi, the username and password are correct. Could it be a saturated memory problem?
I have elk in a proxmox container and its memory is at 96.5%.
Thanks for the reply.

May be share the elasticsearch logs?