It may be due to any of the following reasons:

• Your account has not been verified. Ensure that you have verified your Exness account before proceeding to invest. 
• The strategy equity is lower than the required minimum. A strategy provider should then make a deposit to increase the strategy equity. 
• The strategy's total equity (strategy provider equity + all investments’ equity) has exceeded 500,000 USD. 
• The strategy provider’s first minimum deposit transaction has not yet been completed. A strategy provider can deposit the minimum required amount for their account type. If a deposit has already been made, it may take time to reflect in the strategy, so check again later.
• If there are less than 3 hours before the market reopens, investors will see an error notification. They can start copying once the market reopens.

Investment creation may not be available in certain regions. Head to your Personal Area (PA) to confirm whether these restrictions apply in your region.