Unknown base64 encoding in racaptcha_en.js

[edwolfe3]

I'm getting an Unknown base64 encoding at char (the char shown varies) while using the following code:

grecaptcha.ready(function() {
    grecaptcha.execute(<valid_key>, {action: <action_string}).then(function(token) {
        ...
    });
});

This worked up until this week. What do I need to fix it?

[edwolfe3]

Nobody getting the same error?

[cchamberlain]

I'm seeing this in Firefox and the timing of the issue report correlates to some major CSS issues that showed up on our site in the past week.

For us I believe this is occurring in an iframe which is explicitly different origin than the main frame for sandbox purposes. There is not much I can think to do other than disable recaptcha since the call stack originates in the recaptcha script:

[edwolfe3]

I'm getting the exact same thing, but I am not using iframes nor do i have a anything from different origins. When I first activated recaptcha, I didn't have any issues. It started after a week or so using it.

[rikvanmechelen]

We're seeing the same issue. @edwolfe3 did you get it resolved, or did you stop using recaptcha?

[edwolfe3]

Unfortunately, no.

[bigs]

I'm experiencing this issue as well. We're using reCAPTCHA v2 in "invisible" mode. The error does not occur on the latest Chrome (on Ubuntu 18.0x), but is a show-stopper in Firefox for me.

[awesomizer]

Same sad experience.

[SandorDobos]

Same here.

[devbikash07]

[SandorDobos]

hi i am not sure but it looks like installing "Enable jQuery Migrate
Helper" to my WP site suffering this problem solved it. regards, s ----- Message from JoppeDC notifications@github.com --------- Date: Tue, 01 Dec 2020 00:47:31 -0800 From: JoppeDC notifications@github.com Reply-To: google/recaptcha
reply@reply.github.com Subject: Re: [google/recaptcha] Unknown base64 encoding in
racaptcha_en.js (#392) To: google/recaptcha recaptcha@noreply.github.com Cc: SandorDobos dbs.sndr@gmail.com, Comment
comment@noreply.github.com

Safari is working for me, but chrome (86.0.4240.198) is not working.
Same issue on the JS file. Did anyone figure out a solution?

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-- Dobos Sándor

[mfrancesw]

Hi, joined just to reply to this, one of the few threads that google returns for this error.

The problem was a mismatch between the call to onSubmit(token) and the id of the webform containing the invisible captcha.

function onSubmit(token) { document.getElementById("mywebform").submit(); }

mywebform better be the right id. Copy and pasted and had a different form id than was in the header. Hope this helps someone else. Took me down a rabbit hole of content security policy that had no bearing on the issue.