Is possible that you dont have any more space to publish.

You need to delete older versions. or applications or data to get more space. One way of seeing if is because of space or not is going to the lifetime.=

I will share your lifetime URL. But you can easily find it in the service center

Then inside of the lifetime you will be able to see your space in your storage

https://success.outsystems.com/Support/Personal_Environment/Manage_the_database_space_of_your_personal_environment?_gl=1*w17jjl*_ga*MTY4ODA4MDcwNC4xNjMzMDc3Njgw*_ga_ZD4DTMHWR2*MTY0NjQ5OTMxOC41LjEuMTY0NjUwMjk2OC42MA..

Check this component to clean your environment

https://www.outsystems.com/forge/component-overview/5018/db-cleaner-on-steroids

And check this post saying how to proceed.

https://www.outsystems.com/forums/discussion/59858/cleaning-system-data/#Post229235

Let me know if it helps.

Kind Regards,

Márcio