When loading the After Effects template, if it changes color or turns green, it may be due to the lack of external materials or some plug-ins, or the problem of version compatibility. Here are some possible solutions:

Confirm whether the materials on which the template depends exist: Some templates need to use external materials, such as pictures and audio. Please make sure that these materials exist in the correct location and are named correctly. If the materials are not in the same folder, you can try to copy them to the same folder and reload the template.

Confirm whether plug-ins are installed: If the template uses some third-party plug-ins, it needs to be installed in After Effects. Please check that the necessary plug-ins are installed correctly and the version matches the version required by the template.

Confirm whether AE versions are compatible: Some AE templates require a specific version of After Effects to work properly. Please confirm that the version of After Effects used is consistent with the version required by the template. If the versions are not compatible, you can try to update After Effects or find a template suitable for the current version.

Cleaning up the cache: Cleaning up the cache in After Effects may also help solve the problem. You can find the clear menu under Edit > Clear Memory and Disk Cache, and then reload the template.

If none of the above methods can solve the problem, you can try to contact the template maker or the community for help. At the same time, you can refer to the After Effects help document or online community to learn more about the skills and precautions of loading templates.