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When did you last login? I will take a look. The system as I see right now is detecting your Posting Key as invalid. If you have changed your password/keys that would explain the issue. Let us know.

I was receiving upvote of my last 4 days post. but from yesterday am not getting any upvote.

Your Private Posting key has been invalid since March, 2019. You need to login with your current valid Private Posting Key so the system can vote on your behalf. Your account was not providing votes back to the pool and thus was removed. If you would like to re-join simply login with your current Posting Key.

I have already done means login. you can see my last 4 days, I was getting upvote from the system but from yesterday not receiving any upvote.

3 hours ago since I inform you "I am not in Shadow Casters list. Please help me. I am not getting upvote nor going from my account."