XF 2.3 Upgrade Error

[SrOTurK]

When trying to upgrade to version 2.3.7, the site opens normally, but when I click on the topic, I get this error. What could be the reason for this? Can you help?

 

[Rene_V]

Looking at the screenshot I think that the upgrade wasn't completed thoroughly. Phrases are all over the place. I would give upgrade another go if I were you. That said, are there any errors logged in recently either in the forum error log or the server error log?

 

[SrOTurK]

I think I used the wrong logic. I assumed that by installing all the files over the null version, I would first upgrade to the licensed version. I guess I made a mistake. How do you upgrade a null version to a licensed version?