"Error: Please use $(ref:runtime.getURL)." in latest Firefox Nightly

[marco-c]

Describe the issue

After entering the password to decrypt data, a "Loading..." prompt appears but nothing happens.
In the browser console, the message "Error: Please use $(ref:runtime.getURL)." is shown (moz-extension://4e8dab5e-4299-4207-a974-f6037c40ea76/dist/popup.js:22).

Browser

Firefox

Browser Version

102.0a1

Extension Version

6.3.4

[marco-c]

Might be a Firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1770667.