Issue with 2.1.8 Update Error 500 on Invoices and Bills

I have just updated to version 2.1.8, the update was completed successfully, but the invoices and bills disappeared, and when I try to add new invoice or bill it gives 500 Internal Server Error.
The rest of the app works fine, I can add revenues, payments, customers and vendors.

Log file can be found here: https://privatebin.net/?cf812cb12ce1339c#84oWDfTGLXUYnrSzBwSvkx6MMJpQ6AZ3x35SmC1oEXyP