Ask HN: Facebook blocking me from removing posts – GDPR compliant?

So I decided to remove a lot of post I made on facebook recently, and that went smooth using the activity log to locate them all (Comments on news articles mostly). I did this at swooping pace since the new UI in facebook works better than it used to in that regards. However, now I get an error message if I try to delete or post anything and only chat seems to work for me.

My question is wether this is even legal, am I not required to be able to delete my own stuff at whim or?