Error session time finishing order

Aw: Error session time finishing order

I don't know the version of software when this error started occur...

Can I update from the latest version and until newest one?

For now I have the newest version....


Also, how can I save all information in order to reinstall plugin?


Thank you in forward...

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Aw: Error session time finishing order

Please response....
I don't have idea how to figure out this situation...