PrimeNG modules causing problems when trying to build angular application in production mode

[Andyblem]

I have an angular application. I have PrimeNG from version 8 to version 9. I have been working on my project for a few months and got no problems. The problem comes when I try to build my angular app in build mode. It seems like every file that utilizes a PrimeNG component throws an error. Here is my environment.

• Angular Cli: 9.1.12

• Angular: 9.1.12

• PrimeNG: 11.0.0 rc-1

I tried updating PrimeNG to the latest version in the hope that it will work.
I also tried to update the version of angular and angular cli but still it didn't work.

The project could compilation production mode when I was using version 8 of PrimeNG.

How can I fix this.