OJS 3.1.1.4 getting blank page

Hi,

Is it possible to do full package upgrade of OJS 3.1.2.1? I tried but it didn’t work. The version still mentioned 3.1.1.4. Could you please give me instruction for doing full package upgrade from ojs 3.1.1.4 to 3.1.2.1? Now my site works with OJS 3.1.1.4 version but not able to solve orcid issue. Author can’t able to save the contributor’s form if they add orcid id.

What specific steps did you try? Did you remember to run the upgrade script after replacing the source code files?