After you download the package from ThemeForest named Elinor 1.0.0.zip, please unzip it. You’ll see a file called Elinor 1.0.0.zip. Inside, you will see a zip file: Elinor 1.0.0.zip which needs to be uploaded and installed.
Now that you made sure WordPress is up to date, you can install the theme via WordPress
Install Elinor theme – version Elementor via WordPress
Step 1 – Log into your WordPress website. From Dashboard go to Appearance > Themes and click Add New.
Step 2 – Click Upload Theme and browse the Elinor 1.0.0.zip file on your computer and click Install Now.
Step 3 – After the theme was uploaded successfully, click to activate it.