Error Send Mail - INFO: task jbd2

Greetings, I have this error on a server and when it appears it stops sending and receiving emails, to solve it you must restart.

Does anyone know how I can solve it?

Debian 11
Hestia Control Panel: v1.5.15
VPS server at Proxmox

Not really a Hestia problem.
Your server is telling you its been unable to write to the disk for 120 seconds. Something is badly wrong. It might be a faulty disk, or some process exhausting memory and causing memory to swap to disk, or … any number of things.
Talk to the person who is in charge of your hardware and sort it out with them. If its a VPS provider, you might ask to move to a different host box.
You may want to also check that you have at least some swapfile enabled, but that’s a stab in the dark.

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We have reviewed in detail and it is a problem of the Proxmox operating system as mentioned by “pluto” not of HestiaCP, thanks for the help we will be giving advances or details.

It shows up only on the KVM virtual server console, no login or anything.

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