[Heroes: Invincible 3 Doomsday Blade Battle: The Last Gate of Blazing Flames] This situation could be caused by damaged or missing game files. You can try the following methods to solve it: 1. Re-install the game. If you have already downloaded the game file and saved it in a reliable place, you can try reinstalling the game. During the installation process, please ensure that you choose the correct installation path and file version. 2. Upgrade the game software. If the game software version was too old, there might be various problems. You can try to download the update package and install the update software to update the game software. 3. Check the game files. If the game file is damaged, you can try to use the game repair tool to repair the file. You can find some useful tools by searching for "Heroes: Invincible 3 Doomsday Blade file repair tool" on the Internet. 4. Uninstall and reload the game. If none of the above methods can solve the problem, you can try uninstalling the game and reinstalling it. During the installation process, please ensure that you choose the correct installation path and file version. If none of the above solutions solve the problem, please consider contacting the game manufacturer or technical support personnel for further assistance.