Quartus qt5.15 - Quartus qt5.15 Hello, I am using Ubuntu Desktop 20.04 LTS and Quartus Prime Lite 20.1. When I enter quartus into terminal, this error occurs: efe@efeASUS:~$ quartus quartus: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.15' not found (required by quartus) How can I solve it? Thanks. Replies: Re: Quartus qt5.15 Since this thread had been solved , we shall close this thread. If you still need further assistance, you are welcome to post a response within 15days or open a new thread, some one will be right with you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you with your follow-up questions. Replies: Re: Quartus qt5.15 I installed Qt_5.15.0, problem solved.