I just noticed that my attempts to send researchers thank you messages for sharing their research are being rejected. I am getting the error message that I can only send this message if I follow the researcher. This has only happened in the past week and I cannot find a way around it. Has anyone else found this problem? I will still request research but it seems very rude not to be able to thank people who send me papers just based on a policy change (if that is what this is).