Why do dashes show up on my Dexcom G6 Apple Watch complication?

Apple stopped supporting the Modular Large watch face complication on watchOS 9. If you use the Modular Large Dexcom watch face complication, it will permanently show dashes (---) after upgrading your Apple Watch to watchOS 9 and the complication won’t be available in the watch complication menus.
Dexcom offers other watch face complications. Please follow Apple’s instructions to remove and add any of the other Dexcom G6 watch app complications.

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