Hello there @rKazlachev!
Checking around the community, this conflict between UE and Houding as popped up from time to time. Your particular error Assertion failed: Export.ObjectName != NAME_None || !(Export.ObjectFlags & RF_Public) aims at UE trying to load an element that is either missing or invalid. Let’s take a few steps for resolution:
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Manual refresh of the Houdini plugin, via deleting “HoudiniEngine” folder from project/engine plugins, removal of “HoudiniEngine” entries from project .ini files, followed by downloading and deploying the latest plugin files to YourProject/Plugins/HoudiniEngine/
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Clear the cache, via closing UE, then deleting Intermediate, Saved, and DerivedDataCache folders
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Test the plugin isolated in an empty project, to check if the erroor is tied to a particular element in the project
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Verify your UE install via launcher, reinstall from scratch if necessary
A few more details can be found in a related thread below: