CSV Import stopped working after update

a very strange situation. I've been using export/import from csv almost daily, because it is a really great way to make bulk changes to the products.
However after last update It stopped working.
In Console I can see to critical errors related to csv import:

Uncaught (in promise) TypeError: Cannot read properties of null (reading 'new')
at Object.importCheck (ba-admin.js?2.17.0:3637:94)
at ba-admin.js?2.17.0:3765:33


Failed to load resource: the server responded with a status of 500 ()

Could you please help me with it?

thank U

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