Editing Portfolio/ Masonry Gallery issue

Hey,

I’m having an issue within the Portfolio and the Masonry Gallery within the dashboard. I can click on them but if I click to go into one of the pre-made galleries or portfolio, or even click to add new, a white screen comes up stating ‘Thank you for choosing wordpress’ and I cannot go any further to editing.

Is there any way to update/edit these widgets/add ons?

Thank you,
Luke.