Demos run perfectly fine, but PsychoPy won't let me save or run an experiment with one text element!

I am experiencing this same error (or a very similar one) now with PsychoPy v 2021.2.3
Demos work, even ones with text but my current experiment fails after the setup routines (which import some csv files, set some variables, etc). I get output is similar to the problem described in the above post. This is an experiment that I ran in April without such problems.

Application Specific Information:
abort() called
Invalid dylib load. Clients should not load the unversioned libcrypto dylib as it does not have a stable ABI.

… with libsystem_kernel.dylib, libsystem_pthread.dylib, etc. and then a lot of python-related stuff in the queue. I checked my python --version; haven’t upgraded it since writing this experiment, and it lists Python 3.7.6.

In case it was a mac-update problem, I tried some solutions recommended here, including downgrading to 2021.1.4 (the version I originally used to build my experiment), deleting old psychopy versions before installing new ones, and undoing and redoing permissions for input monitoring, none of which changes the behavior.

In the runner, I also get this message when loading in my experiment (only when using v2021.2.3):

Alert 4405: Editable textbox component freeRecallResp and keyboard component endRecallKeypress in the same routine may compete for keypresses
For more info see https://docs.psychopy.org/alerts/4405.htmlAlert 4405: Editable textbox component freeRecallResp and keyboard component endRecallKeypress in the same routine may compete for keypresses

… but the page indicated by the link (Alert 4405) doesn’t seem to exist anymore.

OS (e.g. Win10): Mac OS 10.15.7 Catalina
PsychoPy version : 2021.2.3 (also tried 2021.1.4, same issue)
Standard Standalone? (y/n) y