The /e/ Apps installer still tends to not work reliably, I experienced this, too, and don’t use it anymore.
Alternatively, you can install https://f-droid.org for Open Source Apps (that’s where the /e/ Apps installer gets those, too), and one of those is Aurora Store, which you can use to install and update Play Store Apps.
For safety’s sake, you would want to invest some time in Aurora’s ignore list in the settings and let Aurora ignore everything you don’t want Aurora to touch, leaving only the Apps you install via Aurora.