Unable to export post type: post (The following error has occured: error, Code: 0)

Hi

I haven’t been using Import WP Pro for few months now. Yesterday when I have I tried to make an export, only ID was exported (as a unique identifier). So I updated WP, plugins and theme, and I tried once againg to export posts but it never ended with 100% (The following error has occured: error, Code: 0).

Could You please help? I do not recal switching off of any of my plugins before import/export.

With regards

Bogumil