Hi! Yes right, I started a new thread where I asked why they removed TCS!? Before a few months I got a new intercom, - the TCS ISW 3030, and I looked up the Compatibility-List before installing, abd TCS was present with much models, and I have setup the opener with the steps what the app showed me specifically for TCS ISW 3030, and it works fully since then!? AND I have the solution to your issue, because I had exactly the same, and it is very easy to solve!!! Go through the setup process as you described before, lie to the app in the last step to get through, when you are through, go into the app - opener - settings - administration, and set the delay for opening to 3-Seconds, and then try again ring to open, it should work now! - This has the reason that, when you ring downstairs the visitor gets a little tütlütlüt tone, for that the visitor knows he has successfully rang, in this time where this tone occurs, the bus is occupied and no other commands are getting executed, and with stock settings the opener sends the opening signal instantly but this opening command doesn’t get executed, because the bus is occupied because the tone is not finished yet, BUT with 3-Seconds opening delay, the opener sends the opening command precisely after the tone is over, and the magic happens and the opening mechanism goes active, also with ring to open! Let me know, if this solved the issue also for you!