JS error “wpcf7 is not defined”

Since a round of plugin updates a week or 2 ago, this plugin is causing a console error (in Chrome) of “wpcf7 is not defined”. Have tried disabling ALL plugins except for CF7 (and required Avada (theme) core plugins) and activating/deactivating Multi-Step reliably triggers this error.

Line that causes the error:
}, null !== (t = wpcf7) && void 0 !== t ? t : {}),
in CF7’s index.js

Context:

document.addEventListener("DOMContentLoaded", (function(e) {
        var t;
        wpcf7 = function(e) {
            for (var t = 1; t < arguments.length; t++) {
                var n = null != arguments[t] ? arguments[t] : {};
                t % 2 ? w(Object(n), !0).forEach((function(t) {
                    c()(e, t, n[t])
                }
                )) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(n)) : w(Object(n)).forEach((function(t) {
                    Object.defineProperty(e, t, Object.getOwnPropertyDescriptor(n, t))
                }
                ))
            }
            return e
        }({
            init: b,
            submit: f,
            reset: p
        }, null !== (t = wpcf7) && void 0 !== t ? t : {}),
        document.querySelectorAll(".wpcf7 > form").forEach((function(e) {
            return wpcf7.init(e)
        }
        ))
    }