Webservice dosent work

hello.
i have some webservices in my website and befor use Cloudflare its ok but when use Cloudflare dosent work.always response undefined varrieable x or y,
when test post webservice with advanced rest client show me this error

date:
Sat, 27 Jul 2019 08:01:59 GMT
content-type:
text/html;charset=utf-8
transfer-encoding:
chunked
connection:
keep-alive
set-cookie:
__cfduid=d260dfc1b4b46ecd0165de4905cb7d5001564214519; expires=Sun, 26-Jul-20 08:01:59 GMT; path=/; domain=.websazandeh.ir; HttpOnly; Secure
x-powered-by:
PHP/7.2.20
cache-control:
public, max-age=0
expires:
Sat, 27 Jul 2019 08:01:59 GMT
x-turbo-charged-by:
LiteSpeed
strict-transport-security:
max-age=15552000; includeSubDomains; preload
x-content-type-options:
nosniff
expect-ct:
max-age=604800, report-uri=“https://report-uri.Cloudflare.com/cdn-cgi/beacon/expect-ct
server:
Cloudflare
cf-ray:
4fcd16a9cb0f97c6-FRA

and in time line 4 step show me
1-Time to connect: 639.59 ms
2-SSL negotiation:198.345 ms
3-Wait time (TTFB):0.78 ms
4-Content download:2.27 ms

please help me what am i doing for this

I don’t see anything in the header that shows a problem with variables. Or any other errors in the header.

What’s the URL?

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