Could you please take a look at our Debug Magento Errors guide and after executing the commands in it restart all the services with:
sudo /opt/bitnami/ctlscript.sh restart
There is also some errors in your logs related to insufficient memory:
mmap() failed:  Cannot allocate memory
PHP Fatal error: Out of memory (allocated 10485760) (tried to allocate 20480 bytes) in /bitnami/magento/vendor/magento/framework/Serialize/Serializer/Serialize.php on line 42
Mon May 17 03:43:09 2021 (16730): Fatal Error Insufficient shared memory!
Mon May 17 03:39:43 2021 (16795): Fatal Error Insufficient shared memory!
Please try increasing your instance’s memory. To do so, you can check this guide for more information.
Francisco de Paz