You can use Firefox to fill that in.

It does get by the "Please wait..." that you get in Preview or Chrome but Firefox 93.0 doesn't actually load the form properly (e.g. it's 6 pages in Acrobat but only 3 pages in Firefox and those 3 pages aren't even rendered properly).

Which version? For me 90.0 shows the "Please wait" message which some JavaScript or something is supposed to replace, and 93.0 force downloads it, even when I try to open it from a local file.

As of Firefox 93.0

From the release notes: "Firefox PDF viewer now supports filling more forms (XFA-based forms, used by multiple governments and banks)."

https://support.mozilla.org/en-US/kb/view-pdf-files-firefox-...

Thanks!