You should be using a wallet from the official Burst website. The link to the official site is in the 1st post.
The website you mentioned is not even loading for me.
I made this wallet a long time ago, before there was a daily contest now, so I didn't know there was a wallet burst like the one on the first page you mentioned. I include this picture of the website address from my wallet. If there is no one using it, I will create another wallet on the first page, but if someone uses it, maybe someone has experienced the same thing as I experienced. Thank you