"QXcbConnection: XCB error:" is from Qt and now: which version of Qt have you installed on your linux? Has you installed all required libraries of Qt5 for Stellarium? How exactly you get binary package of Stellarium?
"QXcbConnection: XCB error:" is from Qt and now: which version of Qt have you installed on your linux? Has you installed all required libraries of Qt5 for Stellarium? How exactly you get binary package of Stellarium?