Getting errors when typing

in the new GUI, I get an error message for every character I type in certain paragraphs. It does not happen in a JDBC/MySQL para, but in Livy paragraphs. Cannot attach screenshot as upload does not work. The error messages appear as tiles on the right hand side of the screen, one for each character. They say: "ERROR: Fail to get completion, cause: org.apache.thrift.TApplicationException: Internal error processing completion".