Please simply follow this guide about Publishing Langify, specifically to the Updating from the Old to the New Publishing Method subsection: Publishing langify
And then this one about publishing the polyfill code: Manually Managing langify's Translation Code , here you will see how to add the POLYFILL CODE.
Of course, this is not the Polyfill code that google ostracizes, but the most recent one we added with the new publishing method.
Once removed the old polyfill code by publishing properly Langify and adding the new polyfill code, all should be fine.