Te mando lo que me dijeron en support de sales nav:
It looks like your LinkedIn account has been temporarily restricted from sending invitations to connect because our system has detected that you’ve sent a large number of invitations within a short amount of time. We have limits in place to protect our overall member experience, and all LinkedIn members are subject to these limits.

You should be able to send invitations again within one week. For your privacy, we cannot disclose any additional information regarding the type or reason for the invitation restriction on your account.