It lacks any support for chan_pjsip meaning the trunks would have to be chan_sip. It also hasn’t been updated since 2019 and even then it was minor updates. On top of that, it is built using PHP5.x and the deprecated/removed mysql driver. It most likely won’t work with PHP7.x.
Someone forked it and got it working with PJSIP and FreePBX v16 but hasn’t touched it since.