apache mod_headers no longer detected

I got this message after installing the plugin in my site:

It seems your server setup does not support headers in .htaccess. You should either fix this (install mod_headers) or deactivate the “Enable direct redirection to existing converted images?” option. Otherwise the Vary:Accept header will not be added and this can result in problems for users behind proxy servers (ie used in larger companies)

My site is running in AWS Lightsail

After googling the issue, I found this solution that worked for me. In case it’s needed for somebody else:

Error con el plugin WebP Express – Plugins WordPress – … (webempresa.com)