Errors in FeedConfigurationDetection.php

Hi,

After the last udpade plugin Facebook for WooCommerce, the following errors appeared:

[09-Jul-2021 09:35:08 UTC] PHP Notice:  Trying to access array offset on value of type null in ................./wp-content/plugins/facebook-for-woocommerce/includes/Feed/FeedConfigurationDetection.php on line 100
[09-Jul-2021 09:35:08 UTC] PHP Notice:  Trying to access array offset on value of type null in ................./wp-content/plugins/facebook-for-woocommerce/includes/Feed/FeedConfigurationDetection.php on line 101
[09-Jul-2021 09:35:08 UTC] PHP Warning:  array_key_exists() expects parameter 2 to be array, null given in ................./wp-content/plugins/facebook-for-woocommerce/includes/Feed/FeedConfigurationDetection.php on line 110
[09-Jul-2021 09:35:08 UTC] PHP Warning:  array_key_exists() expects parameter 2 to be array, null given in ................./wp-content/plugins/facebook-for-woocommerce/includes/Feed/FeedConfigurationDetection.php on line 114
[09-Jul-2021 09:35:08 UTC] PHP Notice:  Trying to access array offset on value of type null in ................./wp-content/plugins/facebook-for-woocommerce/includes/Feed/FeedConfigurationDetection.php on line 121
[09-Jul-2021 09:35:08 UTC] PHP Warning:  array_key_exists() expects parameter 2 to be array, null given in ................./wp-content/plugins/facebook-for-woocommerce/includes/Feed/FeedConfigurationDetection.php on line 122

If I try to make changes to the product in the store, I get a server error (Internal server error 500). I had to restore my back up data twice today.

I had to disable this plug

I have the following software versions:

WordPress – 5.7.2
PHP – 7.4.15
WooCommerce – 5.4.1
Facebook-for-WooCommerce – 2.6.1

Can someone help me find the cause of the error and how to solve it?

thx