Student Finance account saying need to upload National insurance numbervevidence

My son's student finance application was approved 5 months ago and he has a letter to confirm that. However, when we log into his online account, it says he has an action to complete - to provide his NI number. I'm pretty sure this was completed on the original application but it's asking for the evidence to be uploaded but doesn't allow this (button greyed out). I have tried to contact SF but no website chat available online and can't get through on the phone. Any ideas? 🤔

Hi Jason, there's no web chat available and can't get through by phone - that's why I've posted on here. Thanks

Thanks Jason. For anyone else experiencingr this, I've now got through to Student Finance who have confirmed that this is a glitch on their system and they are having multiple calls on the issue. The agent was able to confirm that no action is required our end and didn't need to check my son's account. They are currently trying to resolve the issue.