Forerunner 255 doens't import calendar now

My Garmin Forerunner 255 cannot import training plan calendar.
I always have this error on Intervals.icu when I enable de fonctionality ?

{“error”:{“status-code”:“429”,“message”:“{}”,“request-id”:“bdae6cd157a3478bc379b6bb9ccfb330”}}

Please be more specific of what exactly you’re trying to do. Add screenshots so we can understand where things are going wrong.
Are you sending an Intervals plan to Garmin Connect or the other way around?
Are finished activities coming in from Garmin correctly?
What are your connection settings?