how do i fix these errors my debug log gave me?

It looks like the theme you are using multinews is using deprecated functions for your version of PHP. See if you can get an updated copy of the theme from the theme author or downgrade your PHP version to pre 7.2

EDIT: Request to edit code.

You can update the code by navigating to the file and the line and updating the line(s) to non-deprecated code.

Example:

[11-Dec-2018 20:25:26 UTC] PHP Deprecated: Function create_function() is deprecated in /home/viralclo/public_html/wp-content/themes/multinews/framework/admin/fonts-option/class.settings-api.php on line 115

There is a deprecated function (create_function()) in:

wp-content/themes/multinews/framework/admin/fonts-option/class.settings-api.php

The end of the error lets you know which line.

on line 115

In this case you can look at an article like:
https://stackoverflow.com/questions/48161526/php-7-2-function-create-function-is-deprecated to see if you can update the deprecated code.

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