[Sandman_28054]

Originally Posted by THEBERBSTER

Hi Sandman
Do a complete uninstall from the control panels program and features for both SH5 and Ubisoft/Uplay game launcher.

Did that once this morning. Did not remove the old SH5 folder in the ubisoft folder, so I manually deleted the file.

Use a registry cleaner.
Post #70 How To Use The Free Registry Cleaner 'Ccleaner' > Includes Download Link

Just downloaded it.

Re-install the game.
Post #5 Update SH5 From v1.0.5.0 To v1.2.0 Immediately After Installing

DId that before the first game launch

Do not add any mods.
Post #74 Run Both SH5.exe And Ubisoft Game Launcher Application's As Administrator's

Did that too, sorry.

This has become a common error message.
Pressing the ESC key a number of times sometimes and then start the game from the SH5.exe again can sometimes cure the problem.
Alternatively try starting the game from the game launcher Uplay.exe

nope, just tried and didn't work, sorry.

If all fails uninstall the game launcher and follow previous instructions.
Download a new genuine game launcher from here and install it in something like. C:\Ubisoft in the folder before where your game is installed.
Post #97 SH5 Game Launcher Install It Anywhere On Any Drive
Peter

I will try again.