Unable to Send MMS Texts on Moto G5 Plus

magenta2392504

    I'm running Android 7.0, Nougat, on my phone, and Textra for my texting app. During the last few days any MMS texts that I try to send, result in the error message: "failed to send"   I've located and applied the Preferred APN settings, but no joy.  I don't have a data cap so that's not the problem.

     

    Any assistance would be greatly appreciated!

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