Problems with the "Download"

Hi there!

You know I'm a bit experimented in Aternos and sometimes the maps disappear. It happened me several times. Well, now, every time I stop the server, I usually tap the Download button to have another backup.

Some days ago, I changed from Google Chrome to Mozilla Firefox. Everything was perfect until yesterday. A friend opened a map and we worked on it a couple hours.
Today, after starting again, I tried the Download button. Nothing happened after two minutes so I entered the Console(F12). A lot of "Este sitio hace uso de un certificado SHA-1" that in English means "This site make a certified SHA-1 use." Eventually some "Cadena vacía pasada a getElementById()." that in English means "Empty chain passed to getElementById()."

I don't want to download Chrome again cause' I'm very lazy

If someone can help me I'll be very happy

Thanks,
~Bis.

Waited 10min cause' I haved to go to do orher things. When I came back nothing happened.

BTW, this morning I tried to Download again but nothing happened.

Thanks,
~Bis