Can't play aac audio files

I have transferred some old albums to iTunes using Audacity. The digital files are in AAC format. They play fine on my own computer. I share my music library with my wife. She is unable to play these on her Mac, although she can play other music from my library.

Here's what the log shows when she tries to start music from one of the affected albums:

error 10:56:24.123577 -0400 iTunes Assertion failure: err == (-208)

error 10:56:24.123611 -0400 iTunes Assertion failure: err == (-208)

error 10:56:24.123708 -0400 iTunes RequireAction failure:

error 10:56:24.123737 -0400 iTunes Assertion failure: err == (-208)

error 10:56:24.123755 -0400 iTunes Assertion failure: err == (-208)

error 10:56:24.123789 -0400 iTunes Assertion failure: err == (-208)

error 10:56:24.123803 -0400 iTunes send) play-failed 0x7fc849c9a200 -208

We're both running the latest version of Mojave.

Any suggestions?