Are you sure you downloaded the right version of the template? The placeholder strings in v2.2 are in the format "{{{ VARIABLE }}}" instead of "%VARIABLE%"; the latter is the format from v1.1, so you may have accidentally used that instead.
I just double checked template v2.2 against Unity v2020.3.30f1 locally and it seems to work fine, lmk if you have any other issues.