Marketo: Data format errors when multiple requests made to retrieve credentials

Found in

EPiServer.MarketingAutomationIntegration.Marketo 3.1.0

Fixed in

EPiServer.MarketingAutomationIntegration.Marketo 3.2.5

EPiServer.MarketingAutomationIntegration.Marketo 3.1.1


Jun 25, 2018


Jul 09, 2018


Closed, Fixed and tested


If multiple concurrent requests are made to pages that require the fetching of credentials, the following error results:

The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.

Note: This error is logged in the log file, not on the web page.