What have you tried so far? On which operating system are you on?
There are two big groups of reasons for failure:
One is missing files/incomplete installation. Sometimes solved by full reinstall. Sometimes by moving/deleting subfolders and let the autopatcher (windows) or the ./ryzom_update.sh script (linux) fix the install.
The second is graphics setup. There are many posts in this forum addressing this. Searching the forum should help.
There are two big groups of reasons for failure:
One is missing files/incomplete installation. Sometimes solved by full reinstall. Sometimes by moving/deleting subfolders and let the autopatcher (windows) or the ./ryzom_update.sh script (linux) fix the install.
The second is graphics setup. There are many posts in this forum addressing this. Searching the forum should help.