We had a bit of a problem with the CocoonJS 1.4 launcher update: Ludei changed their code for the advertising and IAP features without warning us, so when it came out it broke those features in Construct 2's CocoonJS plugin. Ludei also so far have been unable to give us a list of precisely what changed and how to fix it, so we are on our own trying to figure out how to update our code to work with 1.4.
One of the shortcomings of being a small company (there are 3 of us) is we don't have comprehensive test cases to check our code against. While we've done our best to make the necessary updates it's difficult for us to have confidence that it's working again. So we need to know from you: are ads and IAP working for anyone? If not, what exactly is working, and what isn't? It only makes sense to test the latest beta (r138.2) with the latest launcher (1.4), since any other combination definitely won't work.
It would be useful to use the bug report guidelines when responding. Statements like "it doesn't work" are usually completely unhelpful, whereas a detailed description of precisely what happens are much more useful.