PHP Fatal error: Vendor library

Error: Uncaught exception 'Twig_Error_Loader' with message 'Template "partials/_master.twig" is not defined in "notfound.twig" at line 1.' in /vendor/twig/twig/lib/Twig/Loader/Chain.php:115
Stack trace:
#0 /vendor/twig/twig/lib/Twig/Environment.php(312): Twig_Loader_Chain->getCacheKey('partials/_maste...')
#1 /vendor/twig/twig/lib/Twig/Environment.php(378): Twig_Environment->getTemplateClass('partials/_maste...', NULL)
#2 /vendor/twig/twig/lib/Twig/Template.php(286): Twig_Environment->loadTemplate('partials/_maste...', NULL)
#3 /app/cache/bd/bd59c296c800e1c0a6d48cbf6f28c2d73d61ac9442fc27b394ce54e4e4e56f1f.php(11): Twig_Template->loadTemplate('partials/_maste...', 'notfound.twig', 1)
#4 /vendor/twig/twig/lib/Twig/Environment.php(411): __TwigTemplate_3fdb0d230a3dad3ab0b5dee298ec7e09f672674d12f8824489314a6b80c3ecab->__construct(Object(Twig_Environment))
#5 /var/www/

File: /vendor/twig/twig/lib/Twig/Loader/Chain.php
Line: 115