Procesos en Microsoft 365 para configurar aplicaciones de Office, canjear claves de producto y activar licencias.
Thank you Juan, for the additional information.
Publisher has been retired earlier this month. See announcement: https://support.microsoft.com/publisher/microsoft-publisher-will-no-longer-be-supported-after-october-2026
According to the article, it says
Microsoft 365 subscribers will not be able to access Publisher on or shortly after October 1, 2026, as the removal update process rolls out.
If you want to continue using Publisher, you would need one-time purchased license like Office 2021, which is a retired version, but at least it can still work with Publisher. The subscription version will not work. This is why I needed to know your license type earlier.