No function at all

It seems to work on “non core” files like Plugin po files

What file(s) were you trying to edit?

languages/de_DE_formal.po from WordPress Core.

Any chance you can send me the file or where you downloaded it? I could probably try any old file and name it that but there’s a chance it’s related to the file contents as well.

Just go to yourwebsite.com/wp-admin/options-general.php and set Site language to “Deutsch (Sie)”.

Okay, yup it was content related. I neglected to have the values escaped properly so the <script> tag inside one of the strings is causing a syntax error. Working on a fix now.

In hindsight having it not escape the HTML in the previews was a bad idea.

Thanks a lot!

Okay, I think I’ve solved the issue; I’ll be able to publish the update later today or tomorrow.

If you’d like to give it a shot, here’s the bleeding-edge version you can manually install and try (literally just 1.3 with these few adjustments): https://github.com/dougwollison/pomo-editor/archive/master.zip