Media Encoder won't properly export my GIF file, it is laggy and slow.

I need to export a GIF version of my video (so it can loop and autoplay when I post it on Behance). I made a video edit in After Effects for my product, the file is 4000x4000 and I need it like that, cuz my other stuff that I recently uploaded on my Behance draft are also the same size and I didn't have the issues with another GIF, except it was the size of: 4000x2000, because it was the first page of the project and it rendered as I wanted it. I tried to export from After Effects to PhotoShop and I get an error, so the only solution is the Media Encoder. I also tried to convert from mp4 to gif using some online apps but it didn't work and now I'm desprate to find an solution, please help.