I have the Joomla back-end version 3.10.11 showing empty container in Extension install admin page which it usually should show the area to upload file to install extension/plugin/template and also button to upload file by file upload.
I updated Joomla from 3.9.5 to 3.10.11 using FTP upload on the following Joomla zip files in order to overwrite files:
- Joomla_3.9.x_to_3.9.12
- Joomla_3.10.0 Update
- Joomla_3.10.x_to_3.10.11 Patch
