I couldn't add a new sub domain

[dr.droplet91]

when i try to add a new sub domain (support) to my addon domain (dropletz.com), This error pops up:

What to do?

[Dead-i]

Have you attempted it more than once? Jackmunch might have been having a "moment" when you submitted it.

[dr.droplet91]

Have you attempted it more than once? Jackmunch might have been having a "moment" when you submitted it.

yes, at least ten times. and when i navigate to support.dropletz.com, HTTP Error 500 appears.

---------- Post added at 10:36 AM ---------- Previous post was at 06:37 AM ----------

can anyone help me? please