Cannot upgrade Cyberpanel - No error message

I’m trying to upgrade from 2.3.4 to 2.3.8 due all the security issues, but in the end the installation console throws an error after start Pure-FTPd, the error doesn’t say anything relevant, just say that something goes wrong, but I can’t find any log or any information about this error. I really need to upgrade Cyberpanel because lot of my customers depends of that. Thanks!

UPDATE
After run some scripts, the version 2.3.8 seems to be installed but no accessible through port 8090, I’m getting a 503 error, and I don’t know how to proceed with that.

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Email their support. Check out their blog posts…they said they will fix the server if someone has problems.

I already did it, but no reply yet. Cannot find any info about this in the blog.