I installed your plugin and the SSH key uploads without issue. However, I cannot upload plugin without receiving the following error
File is empty. Please upload something more substantial. This error could also be caused by uploads being disabled in your php.ini or by post_max_size being defined as smaller than upload_max_filesize in php.ini.
The max upload siz
e is set much larger than the plugins and uploads are not disabled in php.ini. Upload via key or password fails.
I cannot currently upgrade WP due to limitations on custom plugins. Any assistance you could provide would be helpful.