Hi Daniel Casota,
Thanks for reaching out to us on the Microsoft Q&A forum.
The unit on importing the solution is optional. Since you’ve already completed the related workshop, you can skip this step and proceed to the next unit.
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.
If you found the information helpful, we would greatly appreciate it if you could acknowledge it by selecting the Accept Answer & Upvote options.
Thank you.