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I get this error when I try to use this ext on any theme other then subsilver, anyone know how to fix?

Fatal error: Uncaught exception 'Twig_Error_Loader' with message 'Unable to find template "@derky_sortablescaptcha/captcha_sortables.html" (looked into: ) in "ucp_register.html" at line 82.' in /home/kustomvi/public_html/forum/phpBB3/vendor/twig/twig/lib/Twig/Loader/Filesystem.php:215 Stack trace: #0 /home/kustomvi/public_html/forum/phpBB3/phpbb/template/twig/loader.php(107): Twig_Loader_Filesystem->findTemplate('@derky_sortable...') #1 /home/kustomvi/public_html/forum/phpBB3/vendor/twig/twig/lib/Twig/Loader/Filesystem.php(139): phpbb\template\twig\loader->findTemplate('@derky_sortable...') #2 /home/kustomvi/public_html/forum/phpBB3/vendor/twig/twig/lib/Twig/Environment.php(312): Twig_Loader_Filesystem->getCacheKey('@derky_sortable...') #3 /home/kustomvi/public_html/forum/phpBB3/vendor/twig/twig/lib/Twig/Environment.php(378): Twig_Environment->getTemplateClass('@derky_sortable...', NULL) #4 /home/kustomvi/public_html/forum/phpBB3/phpbb/template/twig/environment.php(166): Twig_Environment->loadTemplate('@derky_sortable...' in /home/kustomvi/public_html/forum/phpBB3/vendor/twig/twig/lib/Twig/Loader/Filesystem.php on line 215

Hello,

This extension is not compatible with the subsilver2 style.

Regards.