Qt_5.11 not found during activation

Hi Nuitrack team,

I tried to follow the instructions to run nuitrack. However, I got this error:

/usr/bin/QtNuitrackLicense: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.11' not found (required by /usr/bin/QtNuitrackLicense)

My system is Ubuntu 18.04:
5.4.0-53-generic #59~18.04.1-Ubuntu SMP Wed Oct 21 12:14:56 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Any help would be appreciated! Thanks!