Just occurred to me that you may have an old version of Scala,
so I copy/paste the code from CyberConfidental.net along with
the the VERSION Scala:
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Welcome to Scala 2.13.6 (Java HotSpot™ 64-Bit Server VM, Java 1.8.0_111).
scala> CyberFakeConfidential(“Hi, man.”)
READ : Hi, man.
Send : List(
912860010, 63388523, 15236694, 474351103, 27722723, 548732527, 677422201, 251960412, 741906963, 459578869,
254198202, 250870634, 548662339, 758404635, 939502037, 424083353, 382556669, 987253256, 412466451, 559844915,
590014446, 844291889, 530174972, 281783329, 258649575, 709636647, 721487402, 399030616, 503262461, 221660216,
246641374, 204027857, 469381614, 39281370, 162312061, 116173546, 608010503, 871826178, 522099518, 872662357,
140782928, 976951346, 717519056, 761948135, 733864020, 459774795, 117460851, 740441581, 200966962, 54242220,
965179966, 995499458, 107980606, 398864821, 355634722, 368713055, 790892959, 963175070, 876493537, 628768655,
77128491, 520891209, 926349096, 256159518, 431572854, 650030001, 879438601, 728993489, 287368614, 123500518,
912055661, 72092599, 266191799, 20720754, 119364337, 296787364, 299519062, 340700760, 609172083, 735104340)
Recv : Hi, man.
scala>
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JVM 2 also works fine even in REPL if I save m, but not x.