The maximum you can bet on a game in a single round/play/spin will be displayed as part of a game tile's info. Most commonly, you will see this before you enter a game.
Sometimes, the game will allow you to choose a stake that is higher than the amount shown but you will receive an error if you try to place that bet. Please note that when this happens, the game may sometimes display additional errors, like a generic or insufficient funds error, even when you have enough funds. Simply dismiss any errors that come up, lower your bet to be less than or equal to the maximum and try again.
If your bet is within the limit and this keeps happening, please contact support for assistance.