Error when publishing apps - is there a limit to number of apps that can be published on different plan levels?

Good morning, I tried to publish a web application but I keep seeing the message "Public Apps are only available on Business and Enterprise plans. Upgrade to create public links to your apps.", I published another app before and it was still working even days ago, what's happening and why every resource, message or even the pricing says I can publish unlimited apps but I'm seeing this message?