Critical Error in Log

I am noticing a critical error in the admin panel logs.

An exception has been thrown during the rendering of a template (“Template “modular/slider.txt.twig” is not defined.”).

I have searched the folders and I do not see a file name ‘slider.txt.twig’. The only file that is close to the name is slider.html.twig.

Here is the rest of the error.

/mnt/www/ffh/vendor/twig/twig/src/Environment.php(497) : eval()'d code(244): Twig\Template->displayBlock(‘content’, Array, Array)
/mnt/www/ffh/vendor/twig/twig/src/Template.php(216): __TwigTemplate_e1740fd41ca4c4ec4c8fdd5203277cdfb0893b35392ad73e2cf2d389ab0d8fbc->block_body(Array, Array)
/mnt/www/ffh/vendor/twig/twig/src/Environment.php(497) : eval()'d code(56): Twig\Template->displayBlock(‘body’, Array, Array)
/mnt/www/ffh/vendor/twig/twig/src/Template.php(443): __TwigTemplate_e1740fd41ca4c4ec4c8fdd5203277cdfb0893b35392ad73e2cf2d389ab0d8fbc->doDisplay(Array, Array)
/mnt/www/ffh/vendor/twig/twig/src/Template.php(414): Twig\Template->displayWithErrorHandling(Array, Array)
/mnt/www/ffh/vendor/twig/twig/src/Environment.php(497) : eval()'d code(38): Twig\Template->display(Array, Array)
/mnt/www/ffh/vendor/twig/twig/src/Template.php(443): __TwigTemplate_875566515accd0438569adf927715de75facf3c4a4e816679af4a8a8d31e110b->doDisplay(Array, Array)
/mnt/www/ffh/vendor/twig/twig/src/Template.php(414): Twig\Template->displayWithErrorHandling(Array, Array)
/mnt/www/ffh/vendor/twig/twig/src/Template.php(422): Twig\Template->display(Array)
/mnt/www/ffh/vendor/twig/twig/src/TemplateWrapper.php(47): Twig\Template->render(Array, Array)