Travel writers will relate to this photo. Universal European electrical adapters are set up to accept many different inputs, so they tend to be loosey-goosey when it comes down to specific prongs from specific countries.
You would think that pressing the adapter in firmly would make it work, but often it turns out you have to press it in firmly and then let it out a little bit to make the light on your charger go on. Then if you can sit there and hold it, you’re fine. If you have to go somewhere, you need to look for a low-tech solution.
I had this problem in Vilnius, Lithania — one rockin town, let me tell you — and here’s how I dealt with it.