Minimserver 2 installation on QNAP TS419PII

[dav1129]

I have a QNAP TS419PII and ran minimserver before successfully. Wanted to upgrade to MinimServer 2 but fail to understand which version I should download and install..
I've tried all three ARM version. I can't install v7 or v8. ARMv5 is the only one which does install but then I keep getting an error message in the system logs about needing to install the correct version..

Type Date Time Users Source IP Computer name Content
Error 2021/05/06 13:41:37 System 127.0.0.1 localhost [App Center] Failed to install MinimServer 2.0.18. Installation package is incompatible. Use the correct package.

which version should I be installing?