Theme Upload failure

Hello,
I’m trying to upload my Newsmag theme to wordpress and I keep on getting this error

,
what could be the real issue here?
Any help will be appreciated.
Thank you!

By the way, this is a wordpress installable file only in zip format. size is 7.9MB
thanks.

You need to extend the limit with your hosting. Speak to your provider or follow steps here

Any idea how I can do this on Google cloud please?

Never tried with that- best option is probably to Google it

Can’t find anything on Google either!