Workaround that I used:
Edited the wp-content/plugins/wp-clone-by-wp-academy/lib/view.php
Moved the checked=”checked”
from
<input id="createBackup" name="createBackup" type="radio" value="fullBackup" checked="checked" /><br/><br/>
To this line
<strong>Restore from URL:</strong><input id="backupUrl" name="backupUrl" type="radio" value="backupUrl" checked="checked"/>
Then clicked “Backup”, because it doesnt update the button either.
But it did work ??