Cook error and cannot connect to session

Thank you for taking the time to look into this.
I would like to ask for everyone’s help.

The following error has been occurring, and I have been unable to connect to the session.
I am having trouble identifying the cause.
Any assistance you can provide would be greatly appreciated.

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An error occurred during the cook of this content
errors.com.epicgames.content-service.cook_failure
CookJobId:a408c942-23a9-4913-ac3e-229dcab9c851
game server(failed to cook module 108b2a15-432e-6469-7d52-3b918b577747 (artifact 0782e82e-9cb4-45dc-ab64-327878b0140e:pc) (cookJobId a408c942-23a9-4913-ac3e-229dcab9c851) with error code errors.com.epicgames.cookplugin.cookfailure)An error occurred during communication with
Internal Cooker Error
Internal Cooker Error

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The error has been observed since the most recent update.
At one point, a warning appeared in UEFN stating that “numbers cannot be used at the beginning of a file name.” After changing the file name, I was able to connect to the session.
However, while working on tasks related to the file name change, a cook error occurred again, and I am now unable to connect to the session.

I appreciate your assistance with this matter.