Hello Marit,
Thank you for reaching out on the Microsoft Q&A forum.
We have tested the solution on our end, and it appears to be working correctly. To help resolve your issue, try importing the solution into a different environment and attempt the import again. Also, clear your browser cache and history, as this often resolves import issues. Kindly refer to the screenshot below.
If you are still facing any issue, please let us know in the comments and where you are encountering this error along with the screenshot for reference. We are glad to help you.
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Thank you.