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Excel PL "RRRR-MM-DD gg.mm" format issue

SPREADSHEET EDITOR 5.5.3. Bug report. Error in reading Excel PL xlsx file. =Tekst(…;“RRRR-MM-DD gg.mm”) is not accepted.
OnlyOffice_RRRR-MM-DD_gg.mm

test1 =TEKST(TERAZ();RRRR-MM-DD gg.mm)
Excel txt 2021-10-27 08.24
OnlyOffice txt RRRR-10-27 gg,10

Hello,
5.5.3 is a pretty old version. Please update to the current version 6.4.2 and check if the issue persists.

You’re right - in version 6.4.2 it works correctly. Please close this issue.