Troubleshooting my website

I am having trouble on my website. Once I click on the link to access on it, it seems blocked and the screen becomes all white.

I can’t get inside the back office and I can’t do anything.

Please anyone can help me? This is very annoying

The website is the following: https://gianluigiceglie.com/gianluigiceglie.com – https://gianluigiceglie.com/gianluigiceglie.com/wp-admin/