pdoTools Error PHP 7.3

Hi All,

Just had a site that was upgraded to PHP 7.3 but the site broke just displaying the following error for pdoTools, all extras are up to date and reverting the site back to PHP 7.0 fixes the issue, any ideas ?

[02-Mar-2020 13:35:56 Europe/London] PHP Fatal error:  Uncaught Error: [] operator not supported for strings in /home/stationp/public_html/core/components/pdotools/model/pdotools/pdofetch.class.php:152