This error is reported when an earlier version of skin is uploaded in dnn 5:
This package does not have a manifest. Old skins and containers do not contain manifests. If this is a legacy skin or container Package please check the check box below and reupload the package.
If you select skin as prompted, click "Next" to display the prompt:
A critical error has occurred.
Cocould not find a part of the path 'e: \ Development \ dotnetnuke \ installarea \ dotnetnuke_05.00.00_install_rc2 \ portals \ _ Default \ temp \ ejrsiiro \. dnn '.
This is because in dnn 5, both the module and the skin are treated as resources in a unified manner. Therefore, unlike the previous one, the skin package also requires. dnn is a suffix definition file (manifest), which is included in the dnn 5 built-in skin package. dnn file.
For details, refer to skinning enhancements.
Copy the two files to the extracted skin directory and then package them again.
Note that dnn5 does not support the zip skin format used to pack skin and container together. Now you have to pack skin and container separately.
Dnn 5 also provides a wizard for the packaging ModuleProgramIf you are interested, you can study it.