How to fix? Error while processing route: adminEmbedding

After domain change, I have all working nicely except
it returns 500 error and this error in log is related I think:

NoMethodError (undefined method 'path_whitelist' for #<EmbeddableHost:0x00007f47fb8463a0>) /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activemodel-

I was using embedding for the Ghost blog only.
How can I remove all embeddings manually?
(hope it will fix this issue)
Or is there a better way to fix this?

Thank you!

Solved. The problem was not in domain change, but in version change to stable from tests-passed. When I returned to tests-passed - I was able to get to the /admin/customize/embedding again.


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