Cant install on linux mint 19
I get this error
GPG error: https://download.flectrahq.com/1.0/pub/deb ./ Release: The following signatures were invalid: BADSIG EF00F70672017BFB FlectraHQ flectra@flectrahq.comThe repository 'https://download.flectrahq.com/1.0/pub/deb ./ Release' is not signed.
Please help