MyTarget has a limit on the number of ads created.
For new accounts — no more than 30 ads.
For existing accounts, the limit depends on the balance and the number of debits for 3 months: if your balance is more than 3000 rubles or if you spent more than 3,000 rubles in the last three months, for every 100 rubles spent, 1 available banner is added.
In other words, if you have 3100 rubles on your account, you can create 31 ads; if you have 3200 rubles on your account, you can create 32 ads.
If you spent 3300 rubles over the past 90 days, your limit is 33 ads.
If you have reached the ad limit, delete unused ads or add funds to your account.