Connection problems from Fenix X7 smartwatch to Android phone

Ok this is going to be a bit longer so please excuse me for that. I got a Doogee S100 phone and a Fenix 7X solar and i use my phone to get lights going and open gates and garage doors with the help of alexa. Now i found out that i can do the same with my watch with SmartThings. I installed that and first it worked fine, taptap on my watch and gates open - really nice. All over a sudden it did not work anymore. I looked up what the net has to say and best would be to reinstall SmartThings on the watch. I did that but when i start it in my watch i get " To complete the pairing open the garmin connect mobile app" and when i do that i get " There is a problem with the connection " with the options of Stop or Retry and the message Website not available. Has anyone seen this before and is someone out there who can help me ? Would be very nice because it is like magic when lights go on or doors open just “like that” Thank you — Wolf