Crash with chart

[OSidorenkov]

Hello! Can you help with my problem with chart.
When I fill in all fields and run a query, I have nothing. But in .log file i see next:

[2016-06-09 13:54:12 [ERROR]] data: (((NAME . Юлия) (KOLVO . 37))
                                     ((NAME . NULL) (KOLVO . 1))
                                     ((NAME . Андрей) (KOLVO . 3))
                                     ((NAME . Анастасия) (KOLVO . 11))
                                     ((NAME . Васимя) (KOLVO . 1))
[2016-06-09 13:54:12 [ERROR]] There is no applicable method for the generic function
                                #<STANDARD-GENERIC-FUNCTION YASON:ENCODE (13)>
                              when called with arguments
                                (:NULL
                                 #<SB-IMPL::STRING-OUTPUT-STREAM {1011BA1873}>).
Backtrace for: #<SB-THREAD:THREAD "hunchentoot-worker-192.168.10.40:48022" RUNNING {1011B475A3}>
0: (TRIVIAL-BACKTRACE:PRINT-BACKTRACE-TO-STREAM #<SB-IMPL::STRING-OUTPUT-STREAM {1011BA1BA3}>)
1: (HUNCHENTOOT::GET-BACKTRACE)
2: ((FLET #:H0 :IN HUNCHENTOOT:HANDLE-REQUEST) #<SIMPLE-ERROR "~@<There is no applicable method for the generic function ~2I~_~S~
          ~I~_when called with arguments ~2I~_~S.~:>" {1011BA1A63}>)
3: (SIGNAL #<SIMPLE-ERROR "~@<There is no applicable method for the generic function ~2I~_~S~
          ~I~_when called with arguments ~2I~_~S.~:>" {1011BA1A63}>)
4: (ERROR "~@<There is no applicable method for the generic function ~2I~_~S~
          ~I~_when called with arguments ~2I~_~S.~:>" #<STANDARD-GENERIC-FUNCTION YASON:ENCODE (13)> (:NULL #<SB-IMPL::STRING-OUTPUT-STREAM {1011BA1873}>))
5: ((:METHOD NO-APPLICABLE-METHOD (T)) #<STANDARD-GENERIC-FUNCTION YASON:ENCODE (13)> :NULL #<SB-IMPL::STRING-OUTPUT-STREAM {1011BA1873}>) [fast-method]
6: (SB-PCL::CALL-NO-APPLICABLE-METHOD #<STANDARD-GENERIC-FUNCTION YASON:ENCODE (13)> (:NULL #<SB-IMPL::STRING-OUTPUT-STREAM {1011BA1873}>))
7: (YASON:ENCODE-ALIST ((:NAME . :NULL) (:KOLVO . 1)) #<SB-IMPL::STRING-OUTPUT-STREAM {1011BA1873}>)
8: (PGCHARTS::FRONT-FETCH-JSON-DATA)
9: ((:METHOD HUNCHENTOOT:ACCEPTOR-DISPATCH-REQUEST (SIMPLE-ROUTES:SIMPLEROUTES-ACCEPTOR T)) #<SIMPLE-ROUTES:SIMPLEROUTES-ACCEPTOR (host *, port 9042)> #<HUNCHENTOOT:REQUEST {1011B58CD3}>) [fast-method]
10: ((:METHOD HUNCHENTOOT:HANDLE-REQUEST (HUNCHENTOOT:ACCEPTOR HUNCHENTOOT:REQUEST)) #<SIMPLE-ROUTES:SIMPLEROUTES-ACCEPTOR (host *, port 9042)> #<HUNCHENTOOT:REQUEST {1011B58CD3}>) [fast-method]
11: ((:METHOD HUNCHENTOOT:PROCESS-REQUEST (T)) #<HUNCHENTOOT:REQUEST {1011B58CD3}>) [fast-method]
12: (HUNCHENTOOT::DO-WITH-ACCEPTOR-REQUEST-COUNT-INCREMENTED #<SIMPLE-ROUTES:SIMPLEROUTES-ACCEPTOR (host *, port 9042)> #<CLOSURE (LAMBDA NIL :IN HUNCHENTOOT:PROCESS-CONNECTION) {1011B5803B}>)
13: ((:METHOD HUNCHENTOOT:PROCESS-CONNECTION (HUNCHENTOOT:ACCEPTOR T)) #<SIMPLE-ROUTES:SIMPLEROUTES-ACCEPTOR (host *, port 9042)> #<USOCKET:STREAM-USOCKET {1011B465A3}>) [fast-method]
14: ((:METHOD HUNCHENTOOT:PROCESS-CONNECTION :AROUND (HUNCHENTOOT:ACCEPTOR T)) #<SIMPLE-ROUTES:SIMPLEROUTES-ACCEPTOR (host *, port 9042)> #<USOCKET:STREAM-USOCKET {1011B465A3}>) [fast-method]
15: ((FLET HUNCHENTOOT::PROCESS-CONNECTION% :IN HUNCHENTOOT::HANDLE-INCOMING-CONNECTION%) #<SIMPLE-ROUTES:SIMPLEROUTES-ACCEPTOR (host *, port 9042)> #<USOCKET:STREAM-USOCKET {1011B465A3}>)
16: ((LAMBDA NIL :IN BORDEAUX-THREADS::BINDING-DEFAULT-SPECIALS))
17: ((FLET #:WITHOUT-INTERRUPTS-BODY-1150 :IN SB-THREAD::INITIAL-THREAD-FUNCTION-TRAMPOLINE))
18: ((FLET SB-THREAD::WITH-MUTEX-THUNK :IN SB-THREAD::INITIAL-THREAD-FUNCTION-TRAMPOLINE))
19: ((FLET #:WITHOUT-INTERRUPTS-BODY-359 :IN SB-THREAD::CALL-WITH-MUTEX))
20: (SB-THREAD::CALL-WITH-MUTEX #<CLOSURE (FLET SB-THREAD::WITH-MUTEX-THUNK :IN SB-THREAD::INITIAL-THREAD-FUNCTION-TRAMPOLINE) {7FFFDDBCEC9B}> #<SB-THREAD:MUTEX "thread result lock" owner: #<SB-THREAD:
THREAD "hunchentoot-worker-192.168.10.40:48022" RUNNING {1011B475A3}>> NIL T NIL)
21: (SB-THREAD::INITIAL-THREAD-FUNCTION-TRAMPOLINE #<SB-THREAD:THREAD "hunchentoot-worker-192.168.10.40:48022" RUNNING {1011B475A3}> NIL #<CLOSURE (LAMBDA NIL :IN BORDEAUX-THREADS::BINDING-DEFAULT-SPEC
IALS) {1011B4752B}> (#<SB-THREAD:THREAD "hunchentoot-worker-192.168.10.40:48022" RUNNING {1011B475A3}> #<SB-THREAD:THREAD "hunchentoot-listener-*:9042" RUNNING {1006E8C483}> #<SB-THREAD:THREAD "main th
read" RUNNING {1005DCE663}>) NIL NIL NIL NIL)
22: ("foreign function: call_into_lisp")
23: ("foreign function: new_thread_trampoline")

There is the same test query here:

Maybe I'm doing something wrong, please help me!

[strogiyotec]

@dimitri were you able to fix it ?