Mount Blue test invite expired before the deadline mailed by eLitmus

Tags: #<Tag:0x00007f53decf1870>

I have applied for Mountblue, and I got an invite for the test, and it had informed by an email in which they have mentioned that the deadline for accepting/declining is 10 a.m. 14th Feb 2019. But when I tried to take this invite om 13th Feb 2019 it is saying that invite is expired. Now, what can be done over this?