Console spam on woocommerce-wordpress's first start

Until now I only ran the default ./start.sh on this laptop.
Today I ran ./start.sh woocommerce-wordpress and while installing it showed a lot of output.

For example:

[22-Oct-2020 11:27:42 UTC] PHP Notice:  register_rest_route was called <strong>incorrectly</strong>. The REST API route definition for <code>wc/v3/brands</code> is missing the required <code>permission_callback</code> argument. For REST API routes that are intended to be public, use <code>__return_true</code> as the permission callback. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 5.5.0.) in /var/www/html/wp-includes/functions.php on line 5225
[22-Oct-2020 11:27:42 UTC] PHP Stack trace:
[22-Oct-2020 11:27:42 UTC] PHP   1. {main}() /usr/local/bin/wp:0
[22-Oct-2020 11:27:42 UTC] PHP   2. include() /usr/local/bin/wp:4
[22-Oct-2020 11:27:42 UTC] PHP   3. include() phar:///usr/local/bin/wp/php/boot-phar.php:11
[22-Oct-2020 11:27:42 UTC] PHP   4. WP_CLI\bootstrap() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php:27
[22-Oct-2020 11:27:42 UTC] PHP   5. WP_CLI\Bootstrap\LaunchRunner->process() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/bootstrap.php:74
[22-Oct-2020 11:27:42 UTC] PHP   6. WP_CLI\Runner->start() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php:23
[22-Oct-2020 11:27:42 UTC] PHP   7. WP_CLI\Runner->load_wordpress() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php:1158
[22-Oct-2020 11:27:42 UTC] PHP   8. WP_CLI::do_hook() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php:1263
[22-Oct-2020 11:27:42 UTC] PHP   9. WC_CLI_Runner::after_wp_load() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/class-wp-cli.php:304
[22-Oct-2020 11:27:42 UTC] PHP  10. do_action() /var/www/html/wp-content/plugins/woocommerce/includes/cli/class-wc-cli-runner.php:59
[22-Oct-2020 11:27:42 UTC] PHP  11. WP_Hook->do_action() /var/www/html/wp-includes/plugin.php:478
[22-Oct-2020 11:27:42 UTC] PHP  12. WP_Hook->apply_filters() /var/www/html/wp-includes/class-wp-hook.php:311
[22-Oct-2020 11:27:42 UTC] PHP  13. Perfect_Woocommerce_Brands\PWB_API_Support->register_endpoints() /var/www/html/wp-includes/class-wp-hook.php:287
[22-Oct-2020 11:27:42 UTC] PHP  14. register_rest_route() /var/www/html/wp-content/plugins/perfect-woocommerce-brands/classes/class-pwb-api-support.php:38
[22-Oct-2020 11:27:42 UTC] PHP  15. _doing_it_wrong() /var/www/html/wp-includes/rest-api.php:103
[22-Oct-2020 11:27:42 UTC] PHP  16. trigger_error() /var/www/html/wp-includes/functions.php:5225

Since I have my history capped I'm not sure what it was doing to cause these, but after those it continued with attachment generation, product category generation, etc. (no more spam).

Good to note that it seems to install fine. It just obscures any potential information on the actual installation process.

Start by running ./start.sh woocommerce-wordpress and inspect the installation output around attachment and product category generation. The report points to /var/www/html/wp-content/plugins/perfect-woocommerce-brands/classes/class-pwb-api-support.php:38 and the WordPress REST route warning; trace how that output reaches the console. Done means installation progress is readable without the repeated notices obscuring it.