Previews may show as:

Dtrace of EvConverterSandbox may show:
(EVConverterSandbox) <20040> EV:L {INSOHelper::CloseSource} DACloseDocument [no error (0)]
(EVConverterSandbox) <20040> EV:M {CINSOConverter::FileOkToConvert} Convert file [True]
(EVConverterSandbox) <20040> EV:L {INSOHelper::OpenSource} Source [C:\Users\vsa.EV\AppData\Local\Temp\EV_CVT_Temp_1\P19572-00003-002f6126-0000-AF.txt] File Id [FI_UNKNOWN] Result [no error (0)]
(EVConverterSandbox) <20040> EV:L {INSOHelper::SetLocalOptions} Configurable html options - SCCOPT_EX_SHOWHIDDENTEXT [True] SCCOPT_EX_SHOWHIDDENSSDATA [True] SCCOPT_EX_SSDBBORDERS [SCCEX_SSDBBORDERS_OFF] SCCOPT_GRAPHIC_OUTPUTDPI [250]
(EVConverterSandbox) <20040> EV:M {CINSOConverter::TryExternalConverter} File Id [FI_UNKNOWN] Sniffed file type [Not found]. Source file type [.txt]
(EVConverterSandbox) <20040> EV:H {CINSOConverter::MapExternalConverterResultToInsoStatus} Conversion failed. Reason [(null)] Result [0xc0040602] ==> Status [Operation not supported (16777220)]
(EVConverterSandbox) <20040> EV:L {INSOHelper::GetArchiveFileRecordCount} File Id [FI_UNKNOWN] Archive file [False] Record Count [0] Result [file handle is invalid (320)]
(EVConverterSandbox) <20040> EV:L {INSOHelper::SetImageConversionOption} Setting SCCOPT_GRAPHIC_TYPE [FI_NONE]
Issue is identified by Oracle Outside 8.5.5 converter to be a bug with their release for RAR versions 5.X, 6.X
This issue has been addressed in EV 14.3.0 and EV 14.3.1.