runtime error during export | WordPress.org

Hi,

I was using your nice plugin for long time without any problems. I recently migrated my database to SQL 8 (pressing from provider) and the are some new troubles regarding export with your plugin.

I can observe export progress to 9-10% and then message: Runtime Error.

For investigation purposes I created very simple environment and the issue can be repeatedly observed. The last line of the log file is:
Logged export event for blog ID 1 from Codexonics\PrimeMoverFramework\classes\PrimeMoverSystemProcessors::primeMoverExportProcessor method: Export result error found:Connection to mysql failed with message: SQLSTATE[HY000] [2002] Connection refused

Can you advise me how to solve this?
Changes in wordpress settings, the database or the server?

Thank you in advance.

Darek

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