Error: ConsentString - Unsupported version 27 in the string to decode about gdpr-transparency-and-consent-framework HOT 3 CLOSED

I'm struggling with a similar issue.
I'm getting "Uncaught Error: ConsentString - Unsupported version 0 in the string to decode".
The consent string I get is "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA".
I get this with both Chrome and Firefox BUT only on a specific website.
I fear there's something with the browser compatibility mode while executing JS.

from gdpr-transparency-and-consent-framework.

my problem is caused by this version of Prototype.js

Prototype JavaScript framework, version 1.6.0.2

more on this later

from gdpr-transparency-and-consent-framework.

I found my issue was caused by the prototype.js overwriting the Array.reduce() method which is defined as follows

  reduce: function() {
    return this.length > 1 ? this : this[0];
  },

to solve this, I will re-assign the correct native implementation of Array.reduce() on top of my CMP code

Array.prototype.reduce = function(callback, initialVal) {
    var accumulator = (initialVal === undefined) ? undefined : initialVal;
    for (var i = 0; i < this.length; i++) {
        if (accumulator !== undefined)
            accumulator = callback.call(undefined, accumulator, this[i], i, this);
        else
            accumulator = this[i];
    }
    return accumulator;
};

hope this may help you as well.

from gdpr-transparency-and-consent-framework.