Hi,
It appears that when you de-installed the plugin it failed partway leaving some UpdraftPlus files behind.
The best solution is to manually remove ‘updraftplus’ folder via FTP from the ‘wp-content/plugins/’ directory.
Then manually upload the plugin via FTP. Download a fresh copy of the plugin from our install guide here. Then, unzip and upload to ‘wp-content/plugins’ so it becomes ‘wp-content/plugins/updraftplus’.
After uploading the files, you can then activate the add-ons and connect plugin to UpdraftPlus.com from your WordPress dashboard.
Kind Regards,
Bryle