Hi, Can anyone has any idea about this issue?

Unexpected token: <

usually means that the SSP or service file has sent back an HTML document rather than JSON. Click on the error and see what the HTML page says

how can we fix this?

Well you would read the error in the page and do what's required to fix it

here is the error

OK, as you can see in the document it is referencing line 9351 in ssp_libraries.js. So go to that line and go from there