This issues is related with the webserver component of the FilemakerWebServer. Most likely, the webserver could not start and therefore any 'interactive' fields will not show as they are delivered to the client via http protocol. You will see that in the Filemaker Server Console the webserver componente will not be marked with a green dot but with a grey one, meaning the server is down. You can test this by changing the field to 'no interactive display' and contents will show (only first page of pdf). The solution - I am afraid - is to reinstall the FMServer so the WebServer starts correctly.
Hello, I am FM9 developer with 20+ years experience in FM. I am Spanish and used to work freelance for clients in Spain, Colombia, London and USA. PLease contact me at jcramirezcelis@gmail.com for further info.