Hey @dejangeorgiev 
I think what might have happened is that you have manually updated frontity to ^1.10.0
in the package.json
and then ran npm install. This gave you the new version of frontity
but because of the package-json.lock
file the dependencies like @frontity/core
were not updated!
We have recently merged a change in https://github.com/frontity/frontity/pull/501 which removed a feature from frontity
and moved it to frontity/core
. So, you got the new version of frontity
without the feature, but you haven’t installed the new version of @frontity/core
where we moved it.
If you delete the package-lock file and the node_modules and re-run npm install
, your project will run successfully 
In the meantime, we’re gonna have a look if the dependency version mismatch is something that we can improve on our side