Sorry about the inconvenience.
What version of Max2Play do you have, what version of the LMS did you install and what Raspberry Pi are you using?
In any case, a re-install of the LMS 7.9 should do the trick. Just click show available versions, select 7.9 and click install. It will overwrite the faulty installation. Also, please be patient as the installation can take a few more minutes than most other software on Max2Play.