Hello Pablo.

We can't replicate this issue on our end, so it could be a conflict with the theme you're using or another plugin:

Can you please share the URL where the form is with me, and I'll gladly take a look?

Thank you Pablo.

The issue is coming from the Bootstrap.js library. You can resolve it with this CSS:

.el-upload__input {
  display: none !important;
}

Our developers are going to work on this for our upcoming updates, so it's resolved for the future without the need to add custom CSS.

Hi again Pablo.

It's caused by the Bootstrap.js conflict with something else, but our developers told me they will inlcude a fix in one of our upcoming updates.

As for translating the string, I suggest installing Loco Translate plugin and search for this string and translate it.

Let me know if there's anything else I can do to help.