May you please clear your cache and cookies or log in with another browser to check if you`re still experiencing the same issue. Please try using this format: YYYY-MM-DD.
Let us know if the issue persists.
I have tried the mentioned DOB formats but nothing appears to work.
It'd be great if anyone of you kindly assists me with this issue asap.
Please try clearing your cache and cookies and then adding your DOB. The correct format is YYYY-MM-DD, if you`re still experiencing the same problem after this let me know. Thank you.