Themes „Biker“ – Code correction after PHP update needed

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Hallo Community,

since long time I use the themes „Biker“ from cats_456 on my own qnap device. Few days ago QNAP updated PHP to version 8.
Afterwards my site did not start with error message:
ArgumentCountError thrown
Too few arguments to function WP_Widget::__construct(),
0 passed in /share/CACHEDEV1_DATA/Web/wordpress/wp-includes/class-wp-widget-factory.php
on line 62 and at least 2 expected

Debugging showed , that this error caused by the theme „Biker“.
Now my question: Is herein someone, who would be able to fix the code, so that „biker“ is able to run as well with PHP 8?
Would be great, because I love this themes , but have know glue about PHP-proamming.
Thanks and looking forward for your replies.
Manfred

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