Joomla! Template ET Fishing - Item Support

Can you please tell me difference between free and paid version of theme?
Hello.
I cannot upload quickstart package to my site(

I got an error message:

"JInstaller :: Install: Could not find installation XML file

Error
Unable to find installation package"

I'm new at this. This is the first time I create a website with a template.
I can’t understand what to do, how to fix a mistake.
Could you help me?
Thank you
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Item Name:
ET Fishing
Downloads:
492
Sales:
28
Created:
2018-05-22
Updated:
2023-05-22
Item Version:
4.1.0
Supported Joomla:
Joomla 4 Product
$29.00 $23.10
Regular License
This item may be used for a single domain only.
$39.00 $31.20
Extended License

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