letsencrypt naviserver failure

[06/Nov/2018:16:55:59][21944.7ff00e682700][-main-] Notice: XOTcl 2.2.0 loaded featuring: memcount 0 profile 0 memtrace 0 assertions 1 dtrace 0 development 0
[06/Nov/2018:16:55:59][21944.7ff00e682700][-main-] Notice: Using ns_cache based on NX 2.2.0
[06/Nov/2018:16:55:59][21944.7ff00e682700][-main-] Notice: adp[default]: mapped {GET HEAD POST} /*.adp
[06/Nov/2018:16:55:59][21944.7ff00e682700][-main-] Notice: tcl[default]: enabletclpages for {GET HEAD POST} requests
[06/Nov/2018:16:55:59][21944.7ff00e682700][-main-] Notice: update interpreter to epoch 1, trace deallocate, time 0.018032 secs
[06/Nov/2018:16:55:59][21944.7ff00e682700][-main-] Notice: update interpreter to epoch 1, trace none, time 0.081818 secs
[06/Nov/2018:16:55:59][21944.7ff0021fc700][-driver:nssock:0-] Notice: starting
[06/Nov/2018:16:55:59][21944.7ff0021fc700][-driver:nssock:0-] Notice: nssock:0: listening on [0.0.0.0]:8080
[06/Nov/2018:16:55:59][21944.7ff00e682700][-main-] Notice: nsmain: NaviServer/4.99.17 (tar-4.99.17) running
[06/Nov/2018:16:55:59][21944.7ff00e682700][-main-] Notice: nsmain: security info: uid=102, euid=102, gid=102, egid=102
[06/Nov/2018:16:55:59][21944.7ff00b998700][-socks-] Notice: socks: starting
[06/Nov/2018:16:55:59][21944.7ff00ad91700][-sched-] Notice: sched: starting
[06/Nov/2018:16:55:59][21944.7ff0021fc700][-driver:nssock:0-] Notice: driver: accepting connections
[06/Nov/2018:16:55:59][21944.7ff0017fb700][-writer0-] Notice: writer0: accepting connections
[06/Nov/2018:16:56:00][21944.7ff0035fe700][-conn:default:0:0-] Notice: update interpreter to epoch 1, trace none, time 0.425787 secs
[06/Nov/2018:16:56:00][21944.7ff0035fe700][-conn:default:0:0-] Notice: thread initialized (0.438098 secs)
[06/Nov/2018:16:56:00][21944.7ff002bfd700][-conn:default:1:0-] Notice: update interpreter to epoch 1, trace none, time 0.437704 secs
[06/Nov/2018:16:56:00][21944.7ff002bfd700][-conn:default:1:0-] Notice: thread initialized (0.439839 secs)
[06/Nov/2018:16:56:00][21944.7ff009316700][-conn:default:3:0-] Notice: update interpreter to epoch 1, trace none, time 0.424307 secs
[06/Nov/2018:16:56:00][21944.7ff009316700][-conn:default:3:0-] Notice: thread initialized (0.426583 secs)
[06/Nov/2018:16:56:00][21944.7ff003fff700][-conn:default:2:0-] Notice: update interpreter to epoch 1, trace none, time 0.434419 secs
[06/Nov/2018:16:56:00][21944.7ff003fff700][-conn:default:2:0-] Notice: thread initialized (0.436635 secs)
[06/Nov/2018:16:56:00][21944.7ff009d17700][-conn:default:4:0-] Notice: update interpreter to epoch 1, trace none, time 0.408754 secs
[06/Nov/2018:16:56:00][21944.7ff009d17700][-conn:default:4:0-] Notice: thread initialized (0.413748 secs)
[06/Nov/2018:16:56:22][21944.7ff009d17700][-conn:default:4:1-] Error: POST /letsencrypt.tcl, PeerAddress: 104.200.129.61
invalid command name "ns_base64urlencodel"
    while executing
"ns_base64urlencodel $payload"
    (procedure ":JWS" line 18)
    invoked from within
":JWS $payload"
    (procedure ":postJwsRequest" line 7)
    invoked from within
":postJwsRequest [:URL new-reg] $payload"
    (procedure ":registerNewAccount" line 29)
    invoked from within
":registerNewAccount $config"
    (procedure "getCertificate" line 58)
    invoked from within
"$c getCertificate"
    at line 761 of adp file "/opt/naviserver/pages/letsencrypt.tcl"
    while processing connection cns1:
        POST /letsencrypt.tcl HTTP/1.1
        Host: schotynet.tk:8080
        User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
        Accept-Language: en-US,en;q=0.5
        Accept-Encoding: gzip, deflate
        Referer: http://schotynet.tk:8080/letsencrypt.tcl
        Authorization: Basic a2hyb25vc3NjaG90eTphYjU1NjQ2Mg==
        Connection: keep-alive
        Upgrade-Insecure-Requests: 1
        Content-Type: application/x-www-form-urlencoded
        Content-Length: 20