Error Oracle Connector

Hi, I’m using knime 4.6 and in the Oracle Connector node I’m using the “Driver for Oracle v. 19.14.0” to be clear, the built-in one. In the preferences I also set a path to point to the ojdbc8.jar driver, but I don’t use it; Sometimes these errors happen to me, not all three but one or the other or the other:

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ERROR : KNIME-Worker-6-Oracle Connector 3:1177 : : Node : DB Insert : 3:1179 : Configure failed (NoClassDefFoundError): Could not initialize class oracle.jdbc.driver.DynamicByteArray

java.lang.NoClassDefFoundError: Could not initialize class oracle.jdbc.driver.DynamicByteArray

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ERROR : KNIME-Worker-8-Oracle Connector 3:1673 : : Node : Oracle Connector : 3:1673 : Execute failed: Index -1 out of bounds for length 0

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ERROR : KNIME-Worker-18-Oracle Connector 3:2011 : : Node : Oracle Connector: 3:2011: Execute failed: DB Session ff333cc1-220d-416f-9379-1b1b0d11044c is invalid. null

Can someone explain to me if this is a dual-driver issue or something else?

Also, since we’re changing all the WKF files to run with 5.4.2 and are configuring the built-in on all of them before doing so, I’d like to avoid error reports. If there’s a jar to configure in the preferences, removing it would be better.

Thanks for your help