Search notes:

/etc/letsencrypt/renewal/

or each managed domain, this directory contains a $DOMAIN.conf file which stores the paths to the domain's

keys and certificates (/etc/letsencrypt/live/$DOMAIN),
the archive dir /etc/letsencrypt/archive/$DOMAIN and
the options used for the renewal process.

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:51 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(51): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(66): id_of(Object(PDO), 'uri', '/notes/Linux/fh...') #2 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/fh...', 1788472765, '216.73.217.21', 'Mozilla/5.0 App...', NULL) #3 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/fhs/etc/letsencrypt/renewal(34): insert_webrequest() #4 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 51