@renzms
Seeing the same issue with plugin and PHP 7.3. Here is the log message example. Looks like there are a couple of instances where PHP deprecated message appears. Let me know if you need those exact lines.
PHP Deprecated: define(): Declaration of case-insensitive constants is deprecated in /var/www/html/wp-content/plugins/wp-rss-aggregator/wp-rss-aggregator.php on line 47
