Can't wait without a fiber - meteor

Question

I'm using the node-imap meteor package to retrieve an email, then use that email to find a guest in a Guests collection. I get the "can't wait without a fiber error" when I include the Guest.findOne code. Here's the code
function openInbox(cb) {
imap.openBox('INBOX', true, cb);
}
imap.once('ready', function() {
openInbox(function(err, box) {
if (err) throw err;
var f = imap.seq.fetch(box.messages.total + ':*', { bodies: ['HEADER.FIELDS (FROM SUBJECT DATE)','TEXT'] });
f.on('message', function(msg, seqno) {
console.log('Message #%d', seqno);
var prefix = '(#' + seqno + ') ';
msg.on('body', function(stream, info) {
if (info.which === 'TEXT')
console.log(prefix + 'Body [%s] found, %d total bytes', (info.which), info.size);
var buffer = '', count = 0;
stream.on('data', function(chunk) {
count += chunk.length;
buffer += chunk.toString('utf8');
if (info.which === 'TEXT')
console.log(prefix + 'Body [%s] (%d/%d)', (info.which), count, info.size);
});
stream.once('end', function() {
if (info.which !== 'TEXT') {
console.log(prefix + 'Parsed header: ');
var header = Imap.parseHeader(buffer);
var from = header.from;
email = from[0].slice(from[0].indexOf('<')+1, from[0].indexOf('>'));
fetched = true;
}
else
console.log(prefix + 'Body [%s] Finished', (info.which));
});
});
msg.once('attributes', function(attrs) {
console.log(prefix + 'Attributes: %s', (attrs, false, 8));
});
msg.once('end', function() {
console.log(prefix + 'Finished');
});
});
f.once('error', function(err) {
console.log('Fetch error: ' + err);
});
f.once('end', function() {
console.log('Done fetching all messages!');
imap.end();
if(fetched){
var guest = Guests.findOne({email: email}, {reactive: false}); // <-- this code causes the error
if(guest){
console.log(guest)
}
}
});
});
});
imap.once('error', function(err) {
console.log(err);
});
imap.once('end', function() {
console.log('Connection ended');
});
imap.connect();
So I tried to do a Meteor.bindEnvironment based on Future.wait() can't wait without a fiber (while waiting on another future in Meteor.method)
function openInbox(cb) {
imap.openBox('INBOX', true, Meteor.bindEnvironment(cb));
}
And get the error message "Cannot read property '_meteor_dynamics' of undefined". So there is no Fiber to bind to? I am still fairly new to Meteor so don't really know where to go from here. An explanation on what is going on and a solution would be great. Any help is appreciated.