Unfortunately this is not something us moderators can remedy. Admins have been notified already, hopefully they can fix it soon.
If on a mobile device, you may or may not encounter some features that won't work such as uploading pics, liking posts, post drafts getting saved, smilies not appearing, etc. Depending on the platform & browser used on your mobile device you can disable website security & the features will work. On Android it's an option called "warn about malicious sites". But if using an older browser it may not have this feature & in some cases you probably won't be able to bypass the error to view this site anyway. However I'm not actually recommending anyone to do this nor am I saying it's 100% safe cause I don't know.