The path you have entered for pdftk is invalid

You probably need to change the path. In your shell, enter which pdftk to see where it has been installed.

Thanks, Liam Morland, Yes, the tool was installed outside the container.

Automatically closed - issue fixed for 2 weeks with no activity.

Same error for me.

Running D10 on a local ddev server.

in Terminal:

locale gives me "en_NZ.UTF-8"
which pdftk gives me "/usr/local/bin/pdftk"

Using those two options on my config page for fillpdf gives me, "The path you have entered for pdftk is invalid. Please enter a valid path. "

You could try putting pdftk without the path. If that doesn't work, there may be something different about ddev which would require some code debugging to fix.

@Liam. Yes, tried that to no avail, it definitely seems to be something with ddev.

It's working on my live server so I'll test there.

Thanks