i am having the same problem, says to patch runelite client. when clicked on then says runelite client has already been patch please restart runelite and runemate which i have done over and over but the same message keeps popping up..
i have also uninstalled runemate, restarted the computer and...
earlier today all my osrs clients were closing once starting a bot.
i followed the step to fix by replacing this file: %USERPROFILE%\jagexcache\jagexlauncher\oldschool\oldschool.prm
now when starting an instance its just loads to 45% and stops and says
an unhandled exception has occurred while...