Cannot access my admin dashboard

Hello.
I’ve installed a slide show plugin on my website (which is compatible with my version of WordPress) and ever since I am not able to access my Admin dashboard.
After I enter the correct user name and password I get the message ‘This page isn’t working’ and I cannot access nor edit any of the information on my Admin page.
I would like to ask for advices and help on how I can enter my page again or how I can access the plugins and remove them since I feel the plugin interferes with the login.
Thank you in advance!