Glitches & bugs in Exporting/Rendering

You have a couple of opacity fades and cuts between 8 images and a background element. 

The only production problems that may cause problems would be the MP4 file as a source file and the M4A file for audio. Pros use frame-based codecs like ProRez and WAV files for audio to avoid those problems. 

If this were my project, I would create a couple of MOGRTs in AE for the text and do all the editing in Premiere Pro, especially if you have a bunch of these to do. The total time spent on the project will be drastically reduced. AE is not an editing app and should only be used for shots that you cannot create in an NLE.

The other potential problem could come from a lack of resources on your machine or a buggy build of AE. We don't have any details, so that's just a guess. 

I didn't take the time to replace any of the images or the audio, but your project rendered fine in about 8 seconds without the images. By the way, I always open Media Encoder before I send a comp to it from inside After Effects. That also saves time.

All of the file names in the render matched the file names in the comp.

Is this using any expressions? If so, those may bomb out and mess up the layout Can't open your project since I don't have a current version here at home, so a screenshot would help. Also clean out the caches before rendering. Since you seem to be on a Mac it could also be an issue with PNG/ JPG due to a bug. Converting the photos to TIFF or similar may be worth a test.

Mylenium 

You have not provided any useful info like actual details about your project, the contents of the composition(s), render settings, screenshots of the problems and so on. You need to be much more specific.

Mylenium