Parse Error - Invalid character reference -AlteryxModule

[pvijendr]

I have desinged a workflow which gets the data from Sharepoint and put in to HDFS path.  It was working fine initially. But After I changed the Annotations, I am getting weird error messge when I tried to run the macro. I am not getting whats the error meant. I double checked all the annotation and there is no duplicates and I didnt use any special character. Can anyone let me know what is the error meant and where I need to check if this error happened. 

Error Message:

Error: Designer x64: The Designer x64 reported: ParseError: Invalid character reference at line 19 and column 23530
while processing "AlteryxModule"

Thanks in advance

[carlson1858]

Likewise, had the same issue, and your comment saved me from many hours of debugging. Thank you!!