Update nopcommerce 3.6 to 3.9

Good, update my web from 3.6 to 3.9 without problems I raise the site.
But when it comes to moving the Seven Spikes Core plugins I get the following error.



What could be the problem?
Thanks.

So what was the problem?

juanma2701 wrote:

Sorry, I did not upload the image of the error, here goes.

(Please post text next time, so we can translate it more easiliy ;)

"one or more required types can not be loaded. Retrieve the LoaderExceptions property for more information"

RE: "moving the Seven Spikes Core plugins"

Moving??  Did you also upgrade the Seven Spikes plugins? (get the correct version?)


(Or, this may help
https://www.nopcommerce.com/boards/t/49086/unable-to-load-one-or-more-of-the-requested-types.aspx