I am running into the same issue on version 1.8.0. I created a world on the Nintendo Switch (v1.8.0) and transferred it to a realms server. Now if I download it on the windows 10 edition (v1.8.0) the above error is reported. This also occurs if I re-download it to the Switch.
Is the realms server's version out of sync with the console / win 10 versions?
I am running into the same issue on version 1.8.0. I created a world on the Nintendo Switch (v1.8.0) and transferred it to a realms server. Now if I download it on the windows 10 edition (v1.8.0) the above error is reported. This also occurs if I re-download it to the Switch.
Is the realms server's version out of sync with the console / win 10 versions?