PHP errors and unable to generate articles

Hey,
our article generation hasn’t worked for over a month. We have updated PHP, reduced the number of tokens etc. But it’s still throwing us an error. Do you know what could be wrong with it?
See:

PS: I have deleted the user name and site URL from the errors below

• Uncaught Error: Call to a member function setTimezone() on string in /mnt/data/accounts/r/USER/data/www/WEB/wp-content/plugins/internal-links/helper/batchinfo.php:158
• FATAL2023-05-26 14:55:56Uncaught TypeError: Return value of Rahul900day\Gpt3Encoder\Bpe::getMinRankPair() must be of the type array, null returned in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/ai-engine/vendor/rahul900day/gpt-3-encoder/src/Bpe.php:147
• FATAL2023-05-26 14:55:49Uncaught Error: Call to a member function setTimezone() on string in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/internal-links/helper/batchinfo.php:158
• FATAL2023-05-26 14:55:49Uncaught TypeError: Return value of Rahul900day\Gpt3Encoder\Bpe::getMinRankPair() must be of the type array, null returned in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/ai-engine/vendor/rahul900day/gpt-3-encoder/src/Bpe.php:147
• FATAL2023-05-26 14:55:44Uncaught Error: Call to a member function setTimezone() on string in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/internal-links/helper/batchinfo.php:158
• FATAL2023-05-26 14:55:42Uncaught TypeError: Return value of Rahul900day\Gpt3Encoder\Bpe::getMinRankPair() must be of the type array, null returned in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/ai-engine/vendor/rahul900day/gpt-3-encoder/src/Bpe.php:147
• FATAL2023-05-26 14:55:42Uncaught Error: Call to a member function setTimezone() on string in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/internal-links/helper/batchinfo.php:158
• FATAL2023-05-26 14:55:39Uncaught TypeError: Return value of Rahul900day\Gpt3Encoder\Bpe::getMinRankPair() must be of the type array, null returned in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/ai-engine/vendor/rahul900day/gpt-3-encoder/src/Bpe.php:147
• FATAL2023-05-26 14:55:34Uncaught Error: Call to a member function setTimezone() on string in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/internal-links/helper/batchinfo.php:158
• FATAL2023-05-26 14:55:34Uncaught TypeError: Return value of Rahul900day\Gpt3Encoder\Bpe::getMinRankPair() must be of the type array, null returned in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/ai-engine/vendor/rahul900day/gpt-3-encoder/src/Bpe.php:147
• FATAL2023-05-26 14:55:32Uncaught Error: Call to a member function setTimezone() on string in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/internal-links/helper/batchinfo.php:158
• FATAL2023-05-26 14:55:29Uncaught TypeError: Return value of Rahul900day\Gpt3Encoder\Bpe::getMinRankPair() must be of the type array, null returned in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/ai-engine/vendor/rahul900day/gpt-3-encoder/src/Bpe.php:147
• FATAL2023-05-26 12:53:24Uncaught Error: Call to a member function setTimezone() on string in /mnt/data/accounts/r/USER/data/www/URL/wp-content/plugins/internal-links/helper/batchinfo.php:158