Update, tried with firefox, chrome, safari, internet explorer, different desktops and same error.
Error displayed 2 times, i have to click 2 time to go ahead. XHR:
wp-login.php?__wallets_apiversion=2&__wallets_action=get_nonces&_=1528848655114
wp-login.php?__wallets_apiversion=2&__wallets_action=get_coins_info
If i stay on the same screen without interaction after the error, it keeps showing the error again and again