I paid for unlimited scripts, why is it that sometimes when I try an add a new script I get error.

The error says that it failed to retrieve billing info or something like that. Also, on an unrelated topic, I asked a question about keeping deployed files on the server and putting in new ones 2 days ago but it seems that no one has responded yet

We will try to reproduce your issue. But it would be more effective if you provide an exact error message and steps to reproduce.

we will answer your question in that topic