[Solved] Can't upgrade QuickSubmit plugin. OJS 3.0

Admin → Settings → Website → Plugins → Plugin Gallery → QuickSubmit can be upgraded
After clicking on QuickSubmit window is open with info and “Plugin already installed, but can be updated to a newer version.” Clicking on the link “Upgrade” opening dialog “Are you sure you wish to upgrade this plugin?”. I’m clicking on OK button and … nothing happening. Help, please!
EDIT: I install it directly, following guides on GitHub.