Something is wrong with your sign message, which I can not verify by Electrum wallet.
-----BEGIN BITCOIN SIGNED MESSAGE-----
bitcointalk.org username: casrow. message sign date: August 4th, 2019
-----BEGIN BITCOIN SIGNATURE-----
Address: 1FBJDiAEyLWCuRgAPgyaCXQfTDS7argck4
H8N192vGwtJdswtFw4eN7nZAY0sd3hn3bHjKkNpXlMMGZtTUARfwJjZa3QeihwRHcatG42eQggzbjhg uX467P2s=
-----END BITCOIN SIGNATURE-----
I checked your previous sign message, and it is verified.
It means details in your second sign message is wrong.
In fact, your correct sign message is
Bitcoin signed message
-----BEGIN BITCOIN SIGNED MESSAGE-----
bitcointalk.org username: casrow. message sign date: August 4th, 2019
-----BEGIN BITCOIN SIGNATURE-----
Address: 38FMP8mQdV5BbmAGe3ZAABQDHiqdDjAJaX
ICb6AvA7iKXyLjVGdFFbMkdM+rP2kFwd3Kc5Lum61j5eR8T16e0nPtpkbxfqqF0qV6svUndSUkt3qK2K9+0o4dU=
-----END BITCOIN SIGNATURE-----
Verified.
Archived.