OsirisP Based on my attempt to unpack using the attached atlas file and PNG image, the unpacking process completed without any issues.
A possible cause is that the name of the PNG file on your local disk differs from the file name specified in the atlas file. The image file name listed in the atlas file is 000101.png, and a PNG file with this exact name is expected to exist in the same directory as the atlas file during unpacking. Therefore, if the files are organized in the folder as shown below, the unpacking should succeed:
For your information, you can unpack a texture atlas using a newer version than the one that packed it without any issues. For example, even if a texture was packed in version 3.8, it can be unpacked using version 4.x.
