I tried to follow the manual install as explained here Extension:Math#Installation
But when I tried to upload the extension to the server some files gave an error "An unknown error occurred? Are you over quota?" I contacted the hosting company (A2 Hosting), they said I'm not over quota and that I should contact MediaWiki. Can you help?
I also I did not understand the installation explained here: https://lists.wikimedia.org/pipermail/mediawiki-l/2018-March/047266.html
I don't understand this: "
"For wikis connected to the internet: Simply download the latest versions for both of Mediawiki core  and the Math extension  and that's it."
MediaWiki is already downloaded and installed. I downloaded and extracted the Math extension, but that's in my computer. I don't get it.
Thanks for the help.