Premiere Pro 14.6 freezing on Encoding 100%

[#1]

When rendering, encoding finishes at 100% then freezes while the mac spinning wheel appears. Happens after every few renders. The video is encoded but premiere pro hangs afterwards.

What is the problem and how to fix it? 

[#2]

When rendering, encoding finishes at 100% then freezes while the mac spinning wheel appears. Happens after every few renders. The video is encoded but premiere pro hangs afterwards.

What is the problem and how to fix it?