Admin page of magento 2.3.1 showing only Html

https://movantechonline.com/admin/admin/system_config/edit/section/yereone_testimonials/key/c6a0c01857e42f52ea402461fd6dfb98783d4905afa9f821a95eb703e146a7c4/

After making some changes from the admin page of magento site the, it started showing only html. Is there any way by which i can resolve this issue?