Premiere 2020 export window won't start exporting in macOS

I updated to Premiere 2020 and it was working fine but suddently it stopped exporting. The export windows opens but it won't start exporting. When I try Encoder, something similar happens. It takes a long time to open it and then it won't start exporting. The project plays fine and I can even render it, but it just doesn't export it. I work as a freelance editor and I need a solution ASAP to deliver this project. Anyone with a similar issue? Thanks

Specs:

iMac (Retina 5K, 27-inch, 2017)

Processor 4.2 GHz Intel Core i7

Memory 40 GB 2400 MHz DDR4

Graphics Radeon Pro 580 8 GB

Title edited by Mod