LimeSDR and GnuRadio 3.10

Gnuradio 3.10.0.0 is the master branch, the work in progress, there is no release (yet). Trying to use 3.10 would be like trying to drive a car while it is still in the factory being assembled.
The latest official release right now of Gnuradio was v3.9.1.0, which was released about a month ago (2021/03/22).

Currently gr-limesdr ( https://github.com/myriadrf/gr-limesdr/tree/gr-3.8 ) only supports Gnuradio 3.8 which you could probably install using pybombs, but me personally I’ve not tried since I posted this thread nearly three months ago when 3.9.0.0 was initially released. For gr-limesdr to work with gnuradio 3.9 will require changes and a new release branch of gr-limesdr.

Or if you absolutely do need to use Gnuradio 3.9, and you can forego all the advantages of using gr-limesdr, then you could probably access LimeSDR hardware via gr-osmosdr, which recently accepted a pull request to added support for Gnuradio 3.9 (2021/01/18), using the soapy bind instead.