Events are not displayed in calendars using the classname parameter

STEPS TO REPRODUCE

Preconditions: Blog application is already installed.

1. Install Full Calendar Macro
2. Create several Blog Posts
3. Create a new page
4. Edit it with CKEditor
5. Click on Source
6. Paste this code (year/month can be modified as required):

   {{calendar classname="Blog.BlogPostClass" startfield="publishDate" editable="false" year="2018" month="10" date="22"/}} 

7. Click 'Save & View'

EXPECTED RESULTS

Inside the table are displayed the blog posts created.

ACTUAL RESULTS

There are no blog posts present in the table. When saving the page, a syntax error is encountered in the console. Please find attached the log.