PDF Templates 7.9.7

Blank Screen when trying to create or edit pdf templates. List view works.

Error is as follows.

Notice: Undefined index: TaxRates in /var/www/html/xxxxxx/modules/AOS_PDF_Templates/views/view.edit.php on line 102

Fatal error: Uncaught Error: Class name must be a valid object or a string in /var/www/html/xxxxxx/modules/AOS_PDF_Templates/views/view.edit.php:103 Stack trace: #0 /var/www/html/xxxxxx/modules/AOS_PDF_Templates/views/view.edit.php(27): AOS_PDF_TemplatesViewEdit->setFields() #1 /var/www/html/xxxxxx/include/MVC/View/SugarView.php(199): AOS_PDF_TemplatesViewEdit->display() #2 /var/www/html/xxxxxx/include/MVC/Controller/SugarController.php(432): SugarView->process() #3 /var/www/html/xxxxxx/include/MVC/Controller/SugarController.php(375): SugarController->processView() #4 /var/www/html/xxxxxx/include/MVC/SugarApplication.php(105): SugarController->execute() #5 /var/www/html/xxxxxx/index.php(52): SugarApplication->execute() #6 {main} thrown in /var/www/html/xxxxxx/modules/AOS_PDF_Templates/views/view.edit.php on line 103

Reinstalling resolved.