Woocommerce is a plugin more than 10MB. I’m assuming this is the error you get, but you need to be more specific next time: Installation failed: There has been a critical error on your website
If I’m right, then you have to upload it manually using an FTP client like Filezilla. Also remember to upload it bit by bit and not the whole thing at once.
If you don’t care about your current main domain,you can just add the domain to your current hosting account via Addon Domain menu on your CPanel.
Main domain will be assigned to main htdocs folder on File Manager menu.
For example,your current main domain is example.epizy.com,then you add other domain example.com. example.epizy.com files will be inside main htdocs folder. example.com files will be inside example.com/htdocs/ folder.
You can’t change your main domain.
If you care about your main domain or you don’t want to use your old domain anymore,you can just make new account hosting on your Client Area menu. Then register it with your new domain.
That domain will become your main domain on that hosting account.
Before adding your new domain to your hosting account,make sure to change your domain nameserver first:
After your new domain successfully be added to your hosting account,you may change your domain nameserver to other nameserver (for example Cloudflare nameserver),then manage your DNS on that nameserver service.
You need to extract the zip file on your computer and upload the extracted folder to htdocs/wp-content/plugins/ with a FTP client like FileZilla and not the File Manager. Also, I moved your posts to this topic; let’s continue the discussion there without opening any further topics about that.
Download Filezilla, get your FTP details from the client area. Enter them on Filezilla and then go to htdocs/wp-content/plugins as @Ergastolator1 said and upload Woocommerce.
You need to use ftpupload.net or ftp.epizy.com as hostname, and the hosting account credentials you can find on the same page of the Client Area from where you open your Control Panel, scrolling down to Account Details and clicking on “Show/Hide” to show the password. Also, please check this article out: