Hi there. I happen to develop Tablo Tools, so I just downloaded v0.3.10 - the latest release - on my mac mini running Catalina 10.15.7 and everything seemed to work fine. Is there anything specific I could try to help with?
I also notice you are interested in messing around with code and the Tablo API/etc … I just published this which may interest you - Unofficial Tablo API Docs & Info
Note that at the bottom are the tools I remember that have source code you can look at and play with.
Cheers!