Zero trust - number of seats exceeded in standard plan

I am using the standard plan, integrated AD to protect a website, but i get this error message “Your Cloudflare Access organization has used all of its available seats this month.”, Why… normally even the free plan offers 50 users

If you go to Settings → Account and on the plan table, how many seats are showing? (It’s expressed as x of y available)

Checked, there is just users… no seats…