With WP Rocket plug installation, I have an error as below, and it keeps happening like every second or even more frequently.
[14-Apr-2024 03:07:00 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:07:48 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:27 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:27 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:28 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:28 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:29 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:30 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:30 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:31 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101 [14-Apr-2024 03:08:31 UTC] PHP Warning: Undefined array key “returnvalue” in /home/ochim/domains/ochim.com/public_html/wp-content/plugins/wp-rocket/inc/Engine/Optimization/RUCSS/Frontend/APIClient.php on line 101
How can I fix this?
TIA.
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