Note: NetherRealm Studios no longer patches MKX. They have moved on to MK1 (2023). Therefore, these client-side fixes are the only solution left.
If the Steam fix didn't work, your problem is
Here is how to fix it, starting with the most effective solution. Mortal Kombat X Online Fix
Did this fix work for you? Let us know in the comments below. For more retro fighting game netcode guides, check out our series on fixing Street Fighter V and Tekken 7.
Once the game is running and Steam recognizes the overlay, use the following methods to connect: Note: NetherRealm Studios no longer patches MKX
| Problem | Likely Fix | |---------|-------------| | “Game is not logged into Steam” | Re-apply fix, run Steam first, exclude MKX.exe from antivirus | | Can’t see any lobbies | Version mismatch between players; use same repack/fix group | | Desync on fight start | One player has different DLC unlocker or different game files | | Crash on “Fetching online profile” | Delete MKX.exe.local if present, or rename steam_api64.dll to steam_api64_o.dll (for some fixes) | | “Invalid platform” error | You’re trying to connect to official servers – online fix only works with direct IP or custom matchmaking |
: Sometimes you may need to add the MK10.exe to your Steam library manually to ensure the overlay and invitation systems function. If the Steam fix didn't work, your problem
How did you this issue—did it start after a specific update or right after installation?
The good news? You don't have to suffer in silence. This guide provides the definitive . Whether you are dealing with Steam connection errors, desyncs, or the dreaded "Invalid Match" screen, here is how to get back to crushing spines.
Before diving into the fixes, it is important to understand why Mortal Kombat X (MKX) has connectivity issues on PC. Unlike its console counterparts, the PC version relies on a specific set of ports and a sometimes-unstable interaction with Steam’s networking infrastructure.
: Most reliable fixes can be found on platforms like Online-Fix.me or FreeTP.org .