Gromacs 2021 beta installaion

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During install of gromacs 2021 beta get below error, my operation system is ubuntu 20.04 and cuda 11.2, i cant install any version of gromacs.please help me.

Hi biotech70,

Thanks a lot for trying the beta and testing! This is very much appreciated from our side - we believe we fixed the issue in the release candidate now. If you have the time, can you download the release candiate and check if the error vanished?
https://manual.gromacs.org/2021-rc1/download.html

Best regards and thanks again for testing!
Christian