It looks like you are encountering an issue with loading a level in Unreal Engine after restarting your computer. Based on the error message, it seems that the issue is related to an access violation when reading an address 0xffffffffffffffff.
This could be caused by a variety of issues such as a corrupted level file, a problem with your project’s assets, or an issue with the Unreal Engine itself.
One possible solution is to try re-opening the level in Unreal Engine and then saving it as a new file. This can help to resolve any issues with the file itself.
Another solution is to try verifying the integrity of your game files, which can help to fix any issues with assets or other files that may have become corrupted.
You can also try looking at the crash logs and see if there is more information about the crash.
In case none of the above solutions work, you can try creating a ticket on the Unreal Engine forum, providing a detailed description of the issue, including the log files, and the steps to reproduce the issue, it’s more likely that someone from the community or the Unreal Engine team can help you resolve the issue.