tail /var/log/apache2/error.log
[Mon Mar 01 10:43:47.075119 2021] [php7:error] [pid 24384] [client 176.198.200.251:35527] PHP Fatal error:  Uncaught Error: Class 'OCA\\DAV\\Connector\\Sabre\\ExceptionLoggerPlugin' not found in /var/www/html/remote.php:61\nStack trace:\n#0 /var/www/html/remote.php(169): handleException()\n#1 {main}\n  thrown in /var/www/html/remote.php on line 61
[Mon Mar 01 10:44:17.054445 2021] [php7:error] [pid 24394] [client 176.198.200.251:35493] PHP Fatal error:  Uncaught Error: Class 'OCA\\DAV\\Connector\\Sabre\\ExceptionLoggerPlugin' not found in /var/www/html/remote.php:61\nStack trace:\n#0 /var/www/html/remote.php(169): handleException()\n#1 {main}\n  thrown in /var/www/html/remote.php on line 61
[Mon Mar 01 10:44:35.243982 2021] [mpm_prefork:notice] [pid 24378] AH00169: caught SIGTERM, shutting down
[Mon Mar 01 10:44:35.352152 2021] [ssl:warn] [pid 24677] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches the server name
[Mon Mar 01 10:44:35.370804 2021] [ssl:warn] [pid 24679] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches the server name
[Mon Mar 01 10:44:35.371191 2021] [http2:warn] [pid 24679] AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.
[Mon Mar 01 10:44:35.388459 2021] [mpm_prefork:notice] [pid 24679] AH00163: Apache/2.4.25 (Debian) OpenSSL/1.0.2u configured -- resuming normal operations
[Mon Mar 01 10:44:35.388629 2021] [core:notice] [pid 24679] AH00094: Command line: '/usr/sbin/apache2'
[Mon Mar 01 10:44:45.701207 2021] [php7:error] [pid 24689] [client 176.198.200.251:35534] PHP Fatal error:  Uncaught Doctrine\\DBAL\\DBALException: Failed to connect to the database: An exception occurred in driver: could not find driver in /var/www/html/lib/private/DB/Connection.php:72\nStack trace:\n#0 /var/www/html/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(1449): OC\\DB\\Connection->connect()\n#1 /var/www/html/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(892): Doctrine\\DBAL\\Connection->getWrappedConnection()\n#2 /var/www/html/lib/private/DB/Connection.php(202): Doctrine\\DBAL\\Connection->executeQuery()\n#3 /var/www/html/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Query/QueryBuilder.php(206): OC\\DB\\Connection->executeQuery()\n#4 /var/www/html/lib/private/DB/QueryBuilder/QueryBuilder.php(217): Doctrine\\DBAL\\Query\\QueryBuilder->execute()\n#5 /var/www/html/lib/private/AppConfig.php(345): OC\\DB\\QueryBuilder\\QueryBuilder->execute()\n#6 /var/www/html/lib/private/AppConfig.php(110): OC\\AppConfig->loadConfigValues()\n#7 /var/www/html/lib/private/AppConfig.php(301): OC\\AppConfig->getApps()\n#8 /var/www/html/lib/pri in /var/www/html/lib/private/DB/Connection.php on line 72