in the universal email code block, we use the following to set the time limit for the script to infinity:
set_time_limit(0);
this is done so that the script will time out on large mailings to many recipients.
your host has disabled the set_time_limit() function
to work around the error, change:
set_time_limit(0);
to:
@set_time_limit(0);
the @ symbol at the beginning of the line will suppress errors.