I can't download my TLS certificate
If the Download button is grayed out, this means that you chose the "automatic" method when you placed your order. An automatic TLS certificate can only be used for a website hosted on a Gandi web hosting platform.
If you need to install your TLS certificate on another server (an external server or a Gandi Cloud server, for example), you will need to choose the "manual" method when you place your order. If you already have an automatic TLS certificate, you can regenerate it free of charge using the manual method, in which case you'll be asked to provide a CSR.
Regenerate an SSL certificate