Error: bad argument type - not a string: #t

        Call history:

        http-client.scm:104: chicken.process-context#get-environment-variable
        http-client.scm:105: srfi-13#string-upcase
        http-client.scm:105: chicken.process-context#get-environment-variable
        http-client.scm:106: chicken.process-context#get-environment-variable
        http-client.scm:107: chicken.process-context#get-environment-variable
        http-client.scm:281: ##sys#call-with-values
        http-client.scm:281: server-connector
        http-client.scm:281: g345
        <eval>    [http-server-connector] (uri-scheme remote-end)
        <eval>    [http-server-connector] (eqv?61 tmp58 (quote #f))
        <eval>    [http-server-connector] (eqv?61 tmp58 (quote http))
        <eval>    [http-server-connector] (eqv?61 tmp58 (quote https))
        <eval>    [http-server-connector] (##sys#call-with-values (##core#lambda () (ssl-connect* #:hostname (uri-host remote-end) #:port (uri...
        <eval>    [http-server-connector] (ssl-connect* #:hostname (uri-host remote-end) #:port (uri-port remote-end) #:sni-name #t #:verify? ...
        <eval>    [http-server-connector] (uri-host remote-end)
        <eval>    [http-server-connector] (uri-port remote-end) <--