Looking for logging into the Magento 2 Adminhtml Css Missing site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Magento 2 Adminhtml Css Missing site. After that you can login as usual with your login credentials.
https://magento.stackexchange.com/questions/97209/magento-2-css-and-javascript-not-loading-from-correct-folder
https://community.magento.com/t5/Magento-2-x-Technical-Issues/Admin-panel-missing-CSS-and-JS/td-p/36098
https://github.com/magento/magento2/issues/1484
https://stackoverflow.com/questions/5261412/magento-admin-missing-css
https://amasty.com/knowledge-base/
https://www.simicart.com/blog/magento-css/
https://www.mageplaza.com/magento-2-social-login-extension/
https://support.weltpixel.com/hc/en-us/articles/115000705293-How-to-customize-css-xml-phtml-js-files-in-Magento-2-examples-Tutorial-
http://blog.chapagain.com.np/magento-admin-css-js-url-problem-after-website-transfer/
https://mageme.com/form-builder-for-magento-2.html
https://docs.shipperhq.com/troubleshooting-magento-2-installations/
https://www.magestore.com/magento-2-tutorial/how-to-edit-magento-2-page-layout/
https://www.classyllama.com/blog/template-override-m2