Errors in the latest version

What to do with ..

Notice: Undefined index: json_key in /home/u119785609/domains/xxxx.nl/public_html/wp-content/plugins/ai-auto-tool/inc/aiautotool_submitindex.php on line 505

Warning: array_rand() expects parameter 1 to be array, null given in /home/u119785609/domains/xxxx.nl/public_html/wp-content/plugins/ai-auto-tool/inc/aiautotool_submitindex.php on line 507

Notice: Trying to access array offset on value of type null in /home/u119785609/domains/xxxx.nl/public_html/wp-content/plugins/ai-auto-tool/inc/aiautotool_submitindex.php on line 507