Thanks, @Retired_mod for your input. I had the same problem and couldn't display the dataframe and I had only mongo-spark-connector installed on my cluster (DBR 14.3 LTS Spark 3.5.0 and Scala 2.12). After I installed the rest of the suggested JAR files it still failed, but after I changed DBR to 13.3 LTS Spark 3.4.1 and Scala 2.12 it worked.