Problem with MMS since update to android pie

I have a galaxy s9 which recently updated to android pie. Ever since, I've been unable to send or receive MMS messages....regular texts work fine. I've gone thru several online trouble shooting steps without success. Other forms of mobile data work fine. One of the online trouble shooting steps suggested checking the APN in carrier settings. However, when I attempted to check the settings the screen says "Access Point Names not available for this user". Is this normal? What else can I do short of completely wiping my phone and starting from scratch? Are there network settings on the carrier side that need to be changed?

Thanks