Can't Import Contacts

I have installed and uninstalled the Chatsie apps on my father’s phone multiple times, but keep running into the same issue: it will not import any of his contacts. It doesn’t recognize them on his phone itself (and I have given it all the permissions that it’s asked for) and when I try to use the internet tools for transferring them, the app just closes and restarts without so much as a single contact being saved. Were it not for this, I feel like Chatsie would be ideal for my father

Can anyone help me with this? His phone is a Motorola G Stylus 5G, if that helps