Welcome to DevKinsta @StudioAkua ! I’m sorry to hear you’re having trouble. For the time being, it may be best to manually install the plugin as @nemanjac suggested. You can find the zip file in your /wp-content/themes/nerduck/plugins_required/ directory. Obtain the zip file and upload it manually.
We have this listed as a bug to resolve. Again I’m very sorry for the trouble there.