WiFi Simple server won't compile

Using brand new WIO Terminal
Trying to compile simple wifi server: Keep getting this error:
Alternatives for lwip/inet_chksum.h: []
ResolveLibrary(lwip/inet_chksum.h)Arduino\libraries\Seeed_Arduino_rpcWiFi\src\ping.cpp:71:10: fatal error: lwip/inet_chksum.h: No such file or directory

→ candidates: []t_chksum.h"


compilation terminated.
Why can’t lwip/inet_checksum.h be found. Am I missing a package?

Yes … .

Thanks for the reply? Why is it not part of the of the SAMD/seeed processor distribution? If not, why not?