I can see that you entered the calling in February and it has been entered correctly. That means it is probably an issue with the LDS Account.
Have the secretary go to
https://account.lds.org/membership and log in. That should land him on the LDS Account page with membership information. He should check to see if his membership record number and birth date are correct there. If the membership record number and birth date aren't there or aren't correct, he needs to use the correct account. If that is the case,
here is the link with instructions for what to do when his MRN is associated with a different account.
If he's using the correct account, he should see his calling listed in the Callings list on the LDS Account membership page. If he is using the correct account and the calling isn't listed there, something is broken. You could try removing and adding the calling again to force the systems to resync or you could have your clerk contact the GSC for assistance.
If the calling is listed on the LDS Account page, he should be able to log in. The next thing to look at would be how he is trying to get into LCR.