Exactly the same issue here so it might be on their end? I know this doesn't solve the issue for you but I think its not something you have to fix at least I don't think.

Yep having the same issue. Hopefully it can be resolved soon.

Same thing, I also get this is I try to click on a character or create a new character. I have tired clearing the cache and different browsers. The App also gives the 403 unless is a existing character/campaign

I can't access any of the campaigns that I'm in. Every time I try, I get the same 403 message, and I can't access them from any of my characters in those campaigns, the My Campaigns page, or anything of the sort. I've been using Beyond for over 2 years now and never experienced anything like this.

Same thing, sort of. I can access previously made characters, can’t make a new one. 

I'm getting the same issue as well

Oh thank goodness. I thought it was just me. Glad to know it's on their end.

Having same issue 403 forbidden. but the android app is still up and working

Definitely something on their end. Same issue here.

Working for me again

Same Issue here, although I can access them still through the app. so maybe that can help whilst they fix the issue?

Same here. Whew. It's on their end

And again here- my players are getting it too

Today is a session for my own campaign so I decided to look at my overall campaign page but it gave me the 403 forbidden error just today and I even tried different browsers with the same effect. 

- Please fix dndbeyond creators

Yes, it is for me too

I am also having this issue!! I was afraid it was just me!!!

Same here.

Seems like its fixed now

Yep, I'm back on. They succeeded their death saving throws.

Same has this issues had any further progress?