Internal Server Error [Merge]

The server started showing an error to merge documents, I need a quick solution, there are some posts on the forum with the same error, with more than 8 hours


i am also gettting same error

also getting this

Access to fetch at ‘’ from origin 'domain has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled.


Request URL: Request Method: POST Status Code: 502 Remote Address: Referrer Policy: strict-origin-when-cross-origin

we are also stucked on this. waiting to resolve from pdfexpress

the request was not made by the browser, it was via the PHP api using the License Key Server

that way there would be no cors problems

yes i get it, but it was working from very long time now. it stopped working last day


We have diagnosed the source of the issue and it has been resolved. Feel free to reach out to me if the issue persists.

Thank you,

We would like to investigate an alternative to the API merge, why I think this post is important:

Merge XFDF signature with iText

Hello ekaleida,

Unfortunately, we do not offer alternative XFDF merging to the API.

Best regards,