Given:
Linux Mint 21
OpenVPN 2.5.5 , Mar 22 2022
OpenSSL 3.0.2 , 15 Mar 2022
I fix the problem:
I install openvpn ver. 2.4.7 and now no error.
OpenVPN 2.4.7 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD] built on Aug 15 2022
library versions: OpenSSL 1.1.1q 5 Jul 2022, LZO 2.10
OpenSSL 1.1.1q 5 Jul 2022