Nostalrius Begins - Quality wow vanilla realm (1.12)

For some reason my guild cannot invite any more players. Says the person is "already invited to a guild" even though she/he is not in one. What is going on? We tried different characters and relogged to no avail.

Is there a max limit to how many members we can have?

Could be 500, not sure 100%

It's limited at 321 members

GENERAL: Limit number of characters in a guild to 300.

from patch notes 12/03

viewtopic.php?f=2&t=3321

MillerOne wrote:It's limited at 321 members

This is correct, we've hit the limit twice and the original number was 299, it's now at 321. An odd number, but whatever, it'd be nice to not deal with limitations either way but there's probably some technical issue about it.