BATTLETECH - Game doesn't start

[PAnZuRiEL]

One line summary of your issue
Game doesn't start

What platform are you running the game on?
Steam

What operating system do you use?
Windows 10 Pro 19042.928

Which version of the game are you running?
Can't open main menu to check

What DLC do you have installed?
Flashpoint, Urban Warfare, Shadowhawk Pack, Heavy Metal

Please explain your issue is in as much detail as possible.
After a recent GPU-related crash during the game, the game now launches, but hangs on a black screen at the point that it should play the opening cinematic. I have tried rebooting, verifying my game files, and doing a complete reinstall of the game, all to no avail.

Have you tried verifying your files?
Yes

Steps to reproduce the issue
Unknown.

Attach DxDiag (PC), System Info log (Mac), or run sudo lshw -html > specs.html and uploaded specs.html (Linux)
File(s) attached

Attach Output Log
Windows: \Users\YourUserName\AppData\LocalLow\Harebrained Schemes\BATTLETECH\output_log.txt
Mac OS: Users >{name} > Library > Logs > Unity > Player.log
Linux: ~/.config/unity3d/Harebrained Schemes/BATTLETECH/Player.log
File(s) attached

If the game crashed, please attach the crash file with the time stamp closest to the crash.
Windows: [Steam library folder]\steamapps\common\BATTLETECH\DumpBox
For v.17 and beyond try here: C:\Users\[YourUserName]\AppData\LocalLow\Harebrained Schemes\BATTLETECH
OSX: Macintosh HD > Users > [username] > Library > Application Support > Steam > steamapps > common > BattleTech > DumpBox
Linux: [Steam library folder]/steamapps/common/BATTLETECH/DumpBox
File(s) attached

If a save game was loaded at the start of the game session, upload it. Please make sure to upload the save game with the timestamp closest to when you loaded it.
Windows:
Steam: [Steam installation folder]\userdata[SteamID]\637090\remote\C0\SGS1
GOG: 'C:\Users\USER_ID\AppData\Local\GOG.com\Galaxy\Applications\50593543263669699\Storage\Shared\Files\C#\SGS#'
Vanilla:'C:\Users\USER_ID\AppData\LocalLow\Harebrained Schemes\BattleTech\C#\SGS#'
OSX:
Steam: Macintosh HD > Users > [username] > Library > Application Support > Steam > userdata > [SteamID] > 637090 > remote > C#> SGS#
GOG: Macintosh HD > Users > [username] > Library > Application Support > GOG.com > Galaxy > Applications > 50593543263669699 > Storage > Shared > Files > C# > SGS#
Vanilla: Macintosh HD > Users > [username]> Library > Application Support > unity.Harebrained Schemes.BattleTech > C# > SGG#
Linux:
Steam: /home/.steam/steam/userdata/[steamID]/637090/remote/C#/SGS#
GOG: /home/[username]/.config/unity3d/Harebrained Schemes/BATTLETECH/remote/C#/SGS#/
Vanilla: /home/[username]/.config/unity3d/Harebrained Schemes/BATTLETECH/remote/C#/SGS#/
File(s) attached

Attach screenshot / video
File(s) attached

 

[AndrewT]

InvalidProtocolBufferException: Protocol message contained an invalid tag (zero).
at Google.Protobuf.CodedInputStream.ReadTag () [0x0011b] in <f9cf94bbbfb041d0abe88cee5be00fc7>:0

The crash apparently corrupted the profile file.

Please go to C:\Users\USERNAME\AppData\LocalLow\Harebrained Schemes\BATTLETECH\ and delete the profiles.dat file .
Note it may be under Local, LocalLow or Roaming, depending. To see the AppData folder you'll need to enable View Hidden Items in File Explorer.

 

[PAnZuRiEL]

Seems to have done the trick! Much appreciated!