Problem install in WordPress



After installing the plugin in WordPress i don’t get to possibility to activate the plugin
instead when is go to a other menu opties the site is try to close and show the login screen.
This fails and i get something like this (sorry it’s dutch, but it says ‘Page can’t be reached’)

When i try to login again i got the same screen. Now i have to go with a ftp to the plugin directory and remove the complete plugin directory [duo-wordpress]. After that i can login

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