Website down - Please assist

Hi Guys, My Website has gone down
https://www.skydivingcanada.ca
and i have no clue how to fix! this has never happened before.
Literally added a photo to my system and an option and it did this.

Suggestions?
Opencart 2.3.0.1
Sorry for double post i realized bug reports is most likely not the right spot for this!

Thank you!

That error points to a full hard disk.

You should check with your host.

You are amazing Uk host, I got in contact with them and they fixed it asap!