Backup Error

I received the following after attempting my first backup using WP Clone. It instructed me to copy and paste the log here.
[STEP] [2021-01-05 12:59:45] Initializing backup…
[INFO] [2021-01-05 12:59:45] Backup & Migration version: 1.0.7
[INFO] [2021-01-05 12:59:45] Site which will be backed up: https://www.addup.co.uk
[INFO] [2021-01-05 12:59:45] PHP Version: 7.4.11
[INFO] [2021-01-05 12:59:45] Web server: Apache
[INFO] [2021-01-05 12:59:45] Max execution time (in seconds): 10800
[INFO] [2021-01-05 12:59:45] Checking if backup dir is writable…
[INFO] [2021-01-05 12:59:45] Initializing custom error handler
[SUCCESS] [2021-01-05 12:59:45] Yup it is writable…
[STEP] [2021-01-05 12:59:45] Scanning files…
[STEP] [2021-01-05 12:59:45] Checking free space, reserving…
[INFO] [2021-01-05 12:59:45] Requires at least 579557514 bytes.
[INFO] [2021-01-05 12:59:45] Disk free space function is not disabled – using…
[SUCCESS] [2021-01-05 12:59:45] There is 680,864.75 MB free.
[SUCCESS] [2021-01-05 12:59:45] Great! We have enough space.
[SUCCESS] [2021-01-05 12:59:45] Confirmed, there is more than enough space, checked: 579557514 bytes
[INFO] [2021-01-05 12:59:45] Scanning done – found 5944 files…
[SUCCESS] [2021-01-05 12:59:45] Backup initialized…
[STEP] [2021-01-05 12:59:45] Initializing archiving system…
[SUCCESS] [2021-01-05 12:59:45] Archive system initialized…
[STEP] [2021-01-05 12:59:45] Preparing map of files…
[SUCCESS] [2021-01-05 12:59:45] Files prepared.
[INFO] [2021-01-05 12:59:45] Starting compression process…
[STEP] [2021-01-05 12:59:45] Smart memory calculation…
[INFO] [2021-01-05 12:59:45] There is 256 MBs of memory to use
[SUCCESS] [2021-01-05 12:59:45] Setting the safe limit to 64 MB
[STEP] [2021-01-05 12:59:45] Making database backup
[INFO] [2021-01-05 12:59:45] Iterating database…
[STEP] [2021-01-05 12:59:47] Reverting backup, removing file…
[ERROR] [2021-01-05 12:59:47] There was an error during backup…
[ERROR] [2021-01-05 12:59:47] Call to a member function fetch_row() on bool
[STEP] [2021-01-05 12:59:47] Aborting backup…
[DOWNLOAD GENERATED] File downloaded on (server time): 2021-01-05 12:59:49
[DOWNLOAD GENERATED] Last update (seconds): 4 seconds ago
[DOWNLOAD GENERATED] Last update (date): 2021-01-05 12:59:45