I am guessing this is the git commit you are talking about:
commit 902a2f08859a0d912aff0562cdaea5a63560124a
Author: Paul Cornett <paulcor@bullseye.com>
Date: Mon Apr 6 20:26:49 2020 -0700
Remove wxAnimation copy ctor and copy-assignment operator implementations
The compiler-generated defaults will do the same thing
Edit: Looks like there was a very long list of wxAnimation changes right before this most recent change.
Tim S.
Adding compiler option "-fpermissive" made it avoid the error.
We really need someone who uses the code to test to verify any possible fix.
This is the line with the problem for me.
m_content_mo.Init(ani.GetFrame(0));
Tim S.
Possible solution is to change
m_content_mo.Init(ani.GetFrame(0));
to
m_content_mo.Init(m_ani.GetFrame(0));
Tim S.