Garena has apparently removed virtual LAN from Garena+ client without any notice. All games including Warcraft 3 TFT/DotA, Counter-Strike and Age of Empire etc. are no longer supported. Users around the world are unable to join game rooms as loading gets stuck at "Auth in Main Server". Also, new Garena+ update is being rolled out in which LAN Games button is completely removed.
IceFrog rolled out a quick update in form of DotA 6.80b to get rid of bugs that appeared earlier, only two of them are reported to fixed in the changelogs.