Sorry to be this quick with an error
Got the error as shown in the picture below.
Just started teh new challenge game, setup a farm, a HQ, a factory and a shop. Issued more shares and took a loan in between.
The shop is already selling leather wallets.
Went to stockmarket, wanted to buy up own corporation stock, i hit the buy button and upon clicking the "ok" button i got the error.
I restarted the game, loaded the challenge, buying right away stock... same error.
Started a new custom game, then same error when buying stock.
Just a fyi (if important) my caplab installation is not on d:\ but on f:\