Shift + Space doesn't work with my keyboard

Have a drink, get a new one

View attached image.

Go back to the store, get a refund.

This is a hardware limitation of your keyboard. Unfortunately, the only solution is that you must purchase a better keyboard that does not have this limitation.

To be more specific:
In order to save money, keyboard manufacturers often put many keys on the same "circuit" of sorts within the wiring of the keyboard. This prevents multiple keys in the same region of the keyboard from being pressed simultaneously. Sometimes it even prevents more than 2 keys at all from across the whole keyboard being pressed at once. Often the shift, ctrl, and alt keys are not within this limitation, so you can hold shift and press 2 other keys at once and it will still work fine.

Even high-end gaming keyboards often have a similar hardware limitation, although the cap is much higher so that it is unlikely to be reached during the normal course of gaming.

Found on some forum. Basically, you should have looked into this before purchasing. Return it if possible, and get something with better quality (and maker sure to do your research before buying!).

Every game or just 1 specific game?

When you buy a Keybord for gaming be sure is this antighost keys.

Buy a fair mechanical keyboard and you will not have this problem. Or look for features like 6NKRO, NKRO or anti-ghosting.