RPC call to uci/get failed with ubus code 9: Unspecified error

Hello and god day,
when I click on
System-Mount Points-

i get an Error

MessageRPC call to uci/get failed with ubus code 9: Unspecified error

Any Ideas ?

My System : OpenWrt 21.02.0-rc4 r16256-2d5ee43dc6 with ArgonTheme v2.2.5]

thanks

Just had this happen here as well. Linksys EA3500 w/ver 21.02.
RPCError

RPC call to uci/get failed with ubus code 9: Unspecified error at handleCallReply (https://192.168.1.1/luci-static/resources/rpc.js?v=git-21.231.26241-422c175:15:3)