An error with your payment paypal on your store - VM 2.0.26d - Joomla 2.5.18

[antonio8]

VM 2.0.26d - Joomla 2.5.18 - recently upgraded from 1.5 using Virtuemart Migrator. Migration was successful but I get an email from Virtuemart Team.
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Hello,
An error with your payment paypal on your store New Concept Lures. The details are logged in the file paypal.1.log.php
The VirtueMart Team
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I have spent hours trying to find a fix to this issue. There is 1 similar post but didn't find solution that worked for me.
The shopper process PayPal payment but the order remains pending and then Virtuemart Team sends this email to Joomla super user.

Any fresh idea how to fix this error would be appreciated.