Snapshot Backup Fails - Tried Everything

Snapshot fails while taking Local backups. It fails at 6~10% while/after backing up wp_options table.

We've tried plugin/theme conflict test. Defined the following in wp-config.php.

define('SNAPSHOT_FILESET_CHUNK_SIZE', 10);
define('SNAPSHOT_TABLESET_CHUNK_SIZE', 10);
define('SNAPSHOT_FILESET_USE_PRECACHE', true);

Could not find anything remarkable in debug.log and snapshot lo. Please note, both are attached in the chat.