Problem with new multi-select attributes

[ktibor]

The attached error message appears at inserting the
new attribute in the Item Attributes pane.
After OK the new attribute is present but accept no values.
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Ultra Recall Professional 6.0 (x64)
Copyright © 2004-2019 Kinook Software, Inc.
Registered to: Tibor Kovacs (1-user license)
Windows version: Windows 10 Home N
Install path: D:\Utils\UltraRecall
HRW15.DLL version 15.0.0.1
HTW21.DLL version 21,0,0,0
msptls.dll version 15.0.4420.1017
msvcr100.dll version 10.00.40219.325
PolarSpellChecker.dll version 4.0.5.5
riched20.dll version 15.0.4420.1017
SftPrintPreview_x64_U_20.dll version 2.07
TEW26.DLL version 26.0.0.7
UltraRecall.exe version 6.0.0.5
unins000.exe version 51.52.0.0
Database filename: D:\KT_dokumentumok\multisel_test.urd
Database version: 4.0.1 [FTS]