After Effects and Media Encoder do not recognize each other's existence

Whenever I try to export my AE projects to media encoder, I get an error message.

AEGP Plugin AEDynamicLInkServer: Adobe Media Encoder is not installed. Please download and install it to use this feature. Go to https://creative.adobe.apps . ( 5027 :: 12 )

followed by

AEGP Plugin AEDynamicLinkServer: Failed to connect to Adobe Media Encoder. ( 5027 :: 12 )

This is quite troubling, as it prevents me from exporting my project(s) to a video file. Does anyone know the solution?

AE: 13.7.2.3

ME: 11.1.0.170

I'm using a Macintosh Laptop.