Cannot reinstall Google Play Services I can't seem to reinstall Google Play Services again.
I tried the APK file thingy from Google but it didn't work. I tried a website called APKPure.com but it also didn't work. I also tried some videos but those are for different models of devices.
I didn't know that Google Play Services plays a big role for an Android and now I can't even sign in into my Play Store account (the sign in button for the Play Store isn't working).
Also, if this helps, I use a Samsung Galaxy Tab 2 (I think it is a 2016 model).
Is there a way to fix this problem?
You might want to try a trick using the Device Administrator.

Settings &gt; Security &gt; Device Administrators
Deactivate Android Device Manager
in Settings &gt; Apps find the Google Play Services
Uninstall Play Services updates

This might restore the version originally shipped with your phone depending on your vendor.
Check if you can activate Play Services again in Settings &gt; Apps &gt; Google Play Services.
Enable Device manager again, like above.
Edit: If this does not help I'd suggest to backup your data and do a device factory reset. (see e.g. https://www.rd.com/article/factory-reset-android/)