(Deluge) Filtering fetched records

I am trying to create a script that checks the status of the zoho sign document where the field waiver_status equals sent, unopened or viewed.

We have thousands of records so I was trying to filter the fetched records but it is telling me I cannot and giving me a generic error.

The error is on line two. I am guessing

// Fetch all records in the form Waiver where Waiver_Status equals sent, unopened, or viewed
recordsToProcess = Waivers.filter("(Waiver_Status == 'sent' or Waiver_Status == 'unopened' or Waiver_Status == 'viewed')");
// Loop through each record
for each record in recordsToProcess
{
// Run the provided code for each record
// Fetch document by Sign_ID
res = zoho.sign.getDocumentById(record.Sign_ID.tolong());
// Check if document retrieval is successful
if(res.get('status') == "success")
{
// Get request status
request_status = res.get('requests').get('request_status');
// Process based on request status
if(request_status == 'completed')
{
info "Document signed by all parties";
record.Waiver_Status = "SIGNED";
}
else if(request_status == 'inprogress')
{
info 'Document in progress';
// Get actions
actions = res.get('requests').get('actions');
// Loop through each action
for each i in actions
{
// Check action status
if(i.get('action_status') == "UNOPENED" || i.get('action_status') == "VIEWED")
{
record.Waiver_Status = i.get('action_status');
}
}
}
else if(request_status == 'recalled')
{
record.Waiver_Status = "RECALLED";
}
else if(request_status == 'expired')
{
record.Waiver_Status = "EXPIRED";
}
// Update the record in Zoho Creator
Waivers.update(record);
}
}