Bought and tried to install statdash-statistics. WordPress says: The package could not be installed. No valid plugins were found.
Plugin install failed.
What to do?
Sometimes the author includes “documentation” in the file and then you will need to unzip the file first. Inside the unzipped folder you will most likely find the actual plugin files.
If this doesn’t work then please contact the author of the plugin. I’m sure they will be happy to help you if you have a valid license