quickload fails

[Devon7]

CL-USER> (ql:quickload "cepl.examples")
To load "cepl.examples":
  Load 1 ASDF system:
    cepl.examples
; Loading "cepl.examples"
[package babel-encodings].........................
[package babel]...................................
..................................................
[package cffi-sys]................................
[package cffi-callbacks]..........................
[package cffi]....................................
..................................................
[package cffi-features]...........................
[package trivial-indent]..........................
[package documentation-utils].....................
[package float-features]..........................
[package cl-opengl-bindings]......................
..................................................
..................................................
[package cl-opengl]...............................
[package cl-ppcre]................................
..................................................
[package ieee-floats].............................
[package vas-string-metrics]......................
[package editor-hints.named-readtables]...........
[package parse-float].............................
[package glsl-spec]...............................
[package fn]......................................
..................................................
[package split-sequence]..........................
..................................................
..................................................
..................................................
[package json]....................................
[package json-rpc]................................
[package defpackage-plus-1].......................
[package defpackage+-user-1]......................
[package autowrap.minimal]........................
[package plus-c]..................................
[package com.metabang.trivial-timeout]............
[package trivial-channels.queue]..................
[package trivial-channels]........................
[package cl-glut].................................
[package sdl2]....................................
[package sdl2-examples]...........................
..................................................
..................................................
[package cepl.sdl2]...............................
..................................................
..................................................
[package dendrite.micro-l-system].................
[package dendrite]................................
[package structy-defclass]........................
[package skitter.sdl2.keys].......................
[package skitter.sdl2.mouse-buttons]..............
[package livesupport].............................
[package %open-asset-import-library]
Evaluation aborted on #<CFFI:LOAD-FOREIGN-LIBRARY-ERROR #x302004ACDD4D>.
Unable to load foreign library (ASSIMP).
Error opening shared library libassimp.dylib : dlopen(libassimp.dylib, 10): image not found.
[Condition of type CFFI:LOAD-FOREIGN-LIBRARY-ERROR]

[Devon7]

Walk into the café and buy something you don't really want in exchange for twenty minutes online.
Download CEPL and hop on the bus for the beach to join tomorrow's dawn patrol.
No signal at the surf shop and no CEPL examples at all. FOO!
Please include at least ONE example in bare CEPL.

[Devon7]

Sometimes, a restart can be a workaround:

⋮
[package %open-asset-import-library]
⋮
Invoking restart: Skip loading #P"/Users/devon/.cache/common-lisp/ccl-1.12-f98-macosx-x64/L5/Devon/quicklisp/dists/quicklisp/software/classimp-20200325-git/library.dx64fsl"
.
(DEFCENUM (AI-TEXTURE-TYPE :INT) (:AI-TEXTURE-TYPE-NONE 0) (:AI-TEXTURE-TYPE-DIFFUSE 1) (:AI-TEXTURE-TYPE-SPECULAR 2) (:AI-TEXTURE-TYPE-AMBIENT 3) (:AI-TEXTURE-TYPE-EMISSIVE 4) (:AI-TEXTURE-TYPE-HEIGHT 5) (:AI-TEXTURE-TYPE-NORMALS 6) (:AI-TEXTURE-TYPE-SHININESS 7) (:AI-TEXTURE-TYPE-OPACITY 8) (:AI-TEXTURE-TYPE-DISPLACEMENT 9) (:AI-TEXTURE-TYPE-LIGHTMAP 10) (:AI-TEXTURE-TYPE-REFLECTION 11)) .............
[package classimp]................................
[package cl-soil].................................
[package stb-image]...............................
[package dirt]....................................
[package temporal-functions]......................
[package tiny-time-manager].......................
[package with-setf].
("cepl.examples")

Sometimes not:

[package classimp].....
> Error: Undefined slot LENGTH in foreign type (STRUCT AI-STRING).
> While executing: CFFI::SIMPLE-FOREIGN-TYPE-ERROR, in process listener(1).