Please follow the below template, it will help us to help you!
Expected Behaviour:
Install completes
Actual Behaviour:
Installation hangs after this step
[✓] Checking for php7.0-sqlite3
NB: same issue happened when trying to upgrade from 3.3. Removed 3.3 and tried a fresh install, same behaviour occurs.
When you run pihole -d , what is the output? You mentioned you cannot get a debug token. If you can generate a debug log, you can paste it here and we'll make it private.