Steps to reproduce the issue

1. Go to your Plugin Manager
2. Disable the following plugins:

• Installer - Install from Folder
• Installer - Install from Upload
• Installer - Install from Web
• Installer - Install from URL

3. Go to administrator/index.php?option=com_installer&view=install

Actual result

Uncaught TypeError: document.getElementById(...) is null --- media/com_installer/js/installer.min.js

Uncaught TypeError: i[0] is undefined --- media/vendor/joomla-custom-elements/js/joomla-tab.min.js

The first error also occurs when you only have Installer - Install from Upload disabled.