Message: The each() function is deprecated. This message will be suppressed on further calls
Since php version 7.2 the each() function is deprecated
Find all while loop with each() function in the reporting/includes/tcpdf.php and modify them to foreach loop.
Example:
while (list($id, $name) = each($attr_array[1])) {
$dom[$key]['attribute'][strtolower($name)] = $attr_array[2][$id];
}need to be
foreach ($attr_array[1] as $id => $name) {
$dom[$key]['attribute'][strtolower($name)] = $attr_array[2][$id];
}