Email notification failure

I am working with OJS v. I am not receiving e-mail notifications. The e-mail address is correct in my profile and I have enabled all types of e-mails. However, I cannot tick the boxes to receive reviewers’ e-mails and authors’ revisions notifications in the workflow (see image below):
Any ideas about what is wrong?

Hi @paula.r.puente

Is this a duplicate of Failure in e-mail notifications?

Regards, Primož

Yes, sorry, I thought I had not sent the previous one correctly.