Problem with staking $NOS

Hello,
I’am trying to stake my $NOS tokens from Brave Wallet on this site:

Wallet connectios is properly done.
I am trying to staking my avaible tokens, accept signature and then after acceptation I have issue like this:
" failed to send transaction: Transaction simulation failed: Attempt to debit an account but found no record of a prior credit."

It seems that can’t recognise any tokens on my wallet.