I had to delete the Android Garmin Connect App and re-install it to get past the error messages the faulty update of a few days ago caused.
Now Garmin Connect only has a record of the activities/runs since that time … just a few runs … and I can't find any trace of the previous runs it had - approximately one year of data is missing.
Luckily the data is intact in Garmin Express, and in Stryd Power Center.
Can someone give me a hint please on how to "import" (?) the historic data back into Garmin Connect?
Thank you!