It appears that the new syncSelectValue – which was changed in this commit – fails to address the case where data-display is used in any of the options. Specifically, the issue occurs here:

When data-display is used, t.data.text contains the value specified in data-display but option.textContent does not. So, for example, if you have:

<option value="my-bold-option" data-display="My <strong>bold</strong> option">My bold option</option>

then:

• t.data.text is My <strong>bold</strong> option
• but option.textContent is My bold option

As a result, the variable option stays undefined and an uncaught Javascript error is thrown here:

interrupting the execution of the importing script.

I tested a solution that takes the data-display case into account and will be happy to contribute with a PR.