Before I posted this issue, I changed the website template, I removed all the old and out-of-date plugins, updated everything I could -- literally 20 hours of work on this issue.
Today I checked the biggest components we have on the site, and they're not showing any errors in the Apache or PHP logs. The PHP errors on this instance are directed to the Apache log, as you see above.
Here's the result of `sudo tail -n 30 /opt/bitnami/mysql/logs/mysqld.log
2021-01-31T02:02:10.884612Z 0 [System] [MY-013172] [Server] Received SHUTDOWN from user <via user signal>. Shutting down mysqld (Version: 8.0.22).
2021-01-31T02:02:13.260253Z 0 [System] [MY-010910] [Server] /opt/bitnami/mysql/bin/mysqld: Shutdown complete (mysqld 8.0.22) Source distribution.
2021-01-31T02:02:43.369834Z 0 [System] [MY-010116] [Server] /opt/bitnami/mysql/bin/mysqld (mysqld 8.0.22) starting as process 3449
2021-01-31T02:02:43.380939Z 0 [Warning] [MY-013242] [Server] --character-set-server: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
2021-01-31T02:02:43.380954Z 0 [Warning] [MY-013244] [Server] --collation-server: 'utf8_general_ci' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
2021-01-31T02:02:43.421876Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-01-31T02:02:44.201401Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-01-31T02:02:44.416088Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /tmp/mysqlx.sock
2021-01-31T02:02:44.492771Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-01-31T02:02:44.492994Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-01-31T02:02:44.534209Z 0 [System] [MY-010931] [Server] /opt/bitnami/mysql/bin/mysqld: ready for connections. Version: '8.0.22' socket: '/opt/bitnami/mysql/tmp/mysql.sock' port: 3306 Source distribution.
2021-01-31T08:36:04.942490Z 0 [System] [MY-013172] [Server] Received SHUTDOWN from user <via user signal>. Shutting down mysqld (Version: 8.0.22).
2021-01-31T08:36:06.929397Z 0 [System] [MY-010910] [Server] /opt/bitnami/mysql/bin/mysqld: Shutdown complete (mysqld 8.0.22) Source distribution.
2021-01-31T08:36:20.444023Z 0 [System] [MY-010116] [Server] /opt/bitnami/mysql/bin/mysqld (mysqld 8.0.22) starting as process 5604
2021-01-31T08:36:20.445813Z 0 [Warning] [MY-013242] [Server] --character-set-server: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
2021-01-31T08:36:20.445828Z 0 [Warning] [MY-013244] [Server] --collation-server: 'utf8_general_ci' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
2021-01-31T08:36:20.452715Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-01-31T08:36:20.877150Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-01-31T08:36:20.998589Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /tmp/mysqlx.sock
2021-01-31T08:36:21.084932Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-01-31T08:36:21.085267Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-01-31T08:36:21.113432Z 0 [System] [MY-010931] [Server] /opt/bitnami/mysql/bin/mysqld: ready for connections. Version: '8.0.22' socket: '/opt/bitnami/mysql/tmp/mysql.sock' port: 3306 Source distribution.`
Here is the result of `sudo tail -n 30 /opt/bitnami/php/var/logs/php-fpm.log
[02-Feb-2021 19:29:07] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 128 idle, and 172 total children
[02-Feb-2021 19:32:18] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 127 idle, and 163 total children
[02-Feb-2021 19:32:19] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 16 children, there are 129 idle, and 166 total children
[02-Feb-2021 19:32:30] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 127 idle, and 171 total children
[02-Feb-2021 19:32:31] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 16 children, there are 126 idle, and 174 total children
[02-Feb-2021 19:36:46] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 119 idle, and 165 total children
[02-Feb-2021 19:36:47] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 16 children, there are 128 idle, and 173 total children
[02-Feb-2021 19:36:48] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 32 children, there are 129 idle, and 175 total children
[02-Feb-2021 19:40:13] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 129 idle, and 155 total children
[02-Feb-2021 19:40:35] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 126 idle, and 167 total children
