Linking IMDB to Amazon

Hi folks,

I'm trying to link my IMDB account to Amazon, however I'm getting an error.

1. I click on Link your Amazon account.

2. Then Click 'Allow' to Sign-In to IMDb, I click Allow.

And 3. I get the below error. (screenshot)

Anyone experienced this before ? Can anybody help me fix this, or provide suggestions ?

Thanking you in advance