How to Fix Fatal Error: max_execution_time Exceeded Error in WordPress ???????

I’m trying to download the Fashion Flat theme
Please, I’ve tried everything and I haven’t succeeded in anything… The download of the theme always gets stuck at 30 percent… I’ve talked to Hostinger (storage provider) I’ve uploaded what’s needed according to the guides and still I can’t.

“The import could not be completed due to a low timeout limit on the server. You need to contact your hosting provider and ask them to increase it to 300 seconds”

It was automatically on 360 – I don’t understand what the problem is??