Hi Nicole,
When we upgrade the SAML module while doing so it will download the new jars as per the latest version but old version jars stays in the repo because of that this issue occurs .
Goto userlib folder in your app( Mendix\{Project}\userlib ) . Check the duplicate version of the jars like httpclient jars
Delete the older version and make sure you have single version of most of the jars related to SAML.
Clean your project from Studio Pro and Re Run .
I hope this will work for you .
Hi Nicole,
I am also facing same issue.
could u please share the jar filename which u are deleted?
Thanks in advance