Version 2.2 update 235 not working on QTS 5.0.1

[dhartert]

I used the QTS built-in update on my TS-451+ and therefore received MinimServer V2.2 update 235. Unfortunately it is not working. I'm getting this error message, also after restarting the QNAP NAS:
"Error writing data to license buffer: platform data error 2a"

The License tab doesn't work either, so I thought I'll purchase the full license and then somehow I should get it working. However, because the license tab is not working, I also cannot upgrade to the full license. When I click on the License tab, I receive the following error message:
Error writing data to license buffer: platform data error 2a; resetting to Starter Edition

So I'm wondering if V2.2 update 235 is not supported with my QTS version? My JRE Version is 8.151.2.3. What else could I check to figure out what's wrong?