@RhezaTesaryou can download the jar from maven repository and import in pega through import wizard.

@RhezaTesar The error you're facing occurs because Pega is trying to load a Java class (org.openxmlformats.schemas.drawingml.x2006.main.ThemeDocument) that exists in the ooxml-schemas-1.4.jar file, but the JAR is missing from the classpath. This JAR is part of the Apache POI project and is used for handling Office Open XML documents (e.g., DOCX, XLSX). You can manually download ooxml-schemas-1.4.jar from the official Maven repository or from the Apache POI website. Once downloaded, you should import it into Pega by navigating to Records > Technical > Library or Records > SysAdmin > Dynamic System Settings, and use the Configure > System > Settings > Classpath to upload and register the JAR under a Pega Code Set (e.g., Custom). Restart the server if needed to make sure the class is recognized properly. Always ensure your deployment follows security and compliance policies for custom JARs.

@RhezaTesarWe are also facing same issue after Pega Infinity upgrade. In recent versions it replaced with new version poi-ooxml-5.2.5.jar and poi-ooxml-lite-5.2.5.jar which does not have few java classes