Sending goals to the 910XT from Connect Modern is currently disabled. You can create goals in Modern and the feature in Connect will still help you keep track of their progress they just wont be sent to the device. Workouts and Courses can be sent from the their individual menus or from the Calendar. I suggest you use the instructions in the FAQ: How do I delete a fitness device from Garmin Express? to delete the device from Express and Connect Modern then pair/sync the two again. This will not delete and activities already uploaded but will clear out any items in the Sync menu waiting to be sent to the device. Return to the Workouts menu and try one workout to make sure it transfers.
Let us know if you get any error messages or have any other questions.
I have already solved the problems with workouts alone as you recommend. The problem of goal in my device though still persist. I hope that you will be able to make solution to this problem soon. Thanks Blaž
