well, maybe if got something wrong, but it gives me this in the end?
2023-05-11 10:50:08 OpenVPN 2.5.3 arm-openwrt-linux-muslgnueabi [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD]
2023-05-11 10:50:08 library versions: OpenSSL 1.1.1t 7 Feb 2023, LZO 2.10
2023-05-11 10:50:08 OpenSSL: error:02001002:system library:fopen:No such file or directory
2023-05-11 10:50:08 OpenSSL: error:2006D080:BIO routines:BIO_new_file:no such file
2023-05-11 10:50:08 Cannot load CA certificate file ca.rsa.4096.crt (no entries were read)
2023-05-11 10:50:08 Exiting due to fatal error
Try to think. If you have the certificate inlined in the configuration file, you don’t have to load it from an external file, right? You have to edit the config file and update all directives that load external files.