Have the same error too. Fix by me was remove the directory
$HOME/.local/share/CCP/EVE/QtWebEngine/Default/
My guess for this is changing version from qtwebengine to a newer version. If you have in
$HOME/.cache/CCP/EVE/QtWebengine/
remove this directory too. Before you do so, leave the laucher. After a new start he creates this directories new and accessable.