500 - Internal Server Error

Error: Unexpected "endif" tag (expecting closing tag for the "block" tag defined near line 7) in "urun_detay.html.twig" at line 421.
File: /home/cleonmyh/public_html/templates/urun_detay.html.twig:421

Stack trace:
#0 /home/cleonmyh/public_html/vendor/twig/twig/src/TokenParser/BlockTokenParser.php(46): Twig\Parser->subparse()
#1 /home/cleonmyh/public_html/vendor/twig/twig/src/Parser.php(224): Twig\TokenParser\BlockTokenParser->parse()
#2 /home/cleonmyh/public_html/vendor/twig/twig/src/Parser.php(104): Twig\Parser->subparse()
#3 /home/cleonmyh/public_html/vendor/twig/twig/src/Environment.php(558): Twig\Parser->parse()
#4 /home/cleonmyh/public_html/vendor/twig/twig/src/Environment.php(589): Twig\Environment->parse()
#5 /home/cleonmyh/public_html/vendor/twig/twig/src/Environment.php(408): Twig\Environment->compileSource()
#6 /home/cleonmyh/public_html/vendor/twig/twig/src/Environment.php(370): Twig\Environment->loadTemplate()
#7 /home/cleonmyh/public_html/vendor/twig/twig/src/Environment.php(333): Twig\Environment->load()
#8 /home/cleonmyh/public_html/app/Core/AbstractController.php(83): Twig\Environment->render()
#9 /home/cleonmyh/public_html/app/Controller/UrunDetayController.php(142): Bieticaret\Core\AbstractController->render()
#10 /home/cleonmyh/public_html/vendor/symfony/http-kernel/HttpKernel.php(163): Bieticaret\Controller\UrunDetayController->index()
#11 /home/cleonmyh/public_html/vendor/symfony/http-kernel/HttpKernel.php(75): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#12 /home/cleonmyh/public_html/app/Routes.php(54): Symfony\Component\HttpKernel\HttpKernel->handle()
#13 /home/cleonmyh/public_html/index.php(40): require_once('/home/cleonmyh/...')
#14 {main}