Either when the user is trying to run a tasks number greater than his allowed limit (e.g. more than 200 threads/tasks and the allowed limit is 200). In this case this is a normal warning.
Either when the user has clicked auto-create tasks in the campaign and he inserted proxies where 80% of these proxies is a number greater than the allowed limit (e.g. If you have 300 proxies, the Bot should automatically create 240 threads for you, but now it's giving an error), in this case, this is a bug and it will be fixed in the next update