In response to Haza2, I'm on MSFS2024 and I deleted the WASM folder during the last update.
I didn't specify it in my first message, but this generally happens randomly, although my last two flights had the same problem.
And even when I select the Navigraph frequency and confirm, it inserts another frequency and tells me that it's not in the database.
The aircraft is also up to date on AIRAC cycles.