How to resolve iTunes error 13026 when adding music via iTunes Match on Mac?

I have an iMac (M1) and a MacBook Air (Sonoma 14.7.5). On my iMac all the music is in the “Music” app. Want to have this music also available on my other devices including my Macbook via iTunes Match (paid subscription), but when the Macbook wants to add in the Music app I keep getting the following error message 13026. I have tried this several times at different times? What Goes Wrong. On my iPhone, however, I do have the music available.

[Re-Titled by Moderator]