windows server 2016

We built the web application using .net core 2.1 and jsreport v2. it works fine in local, dev, and qa env. but timed out in production. The file is very small, only 11 pages. we tried everything, still couldn't get it working.

JsReportBinaryException: Error rendering report: A critical error occurred while trying to execute the render command: Timeout Error: pdf generation not completed after 30000ms (1). caused by error (1) -> meta = {"remoteStack":"Error: Timeout Error: pdf generation not completed after 30000ms\n at Timeout.setTimeout (jsreportRuntime.js:134749:19)\n at ontimeout (timers.js:482:11)\n at tryOnTimeout (timers.js:317:5)\n at Timer.listOnTimeout (timers.js:277:5)"}, stack = Error: at responseToBuffer ([eval]:42206:29) at concat ([eval]:42259:40) at ConcatStream.<anonymous> ([eval]:13929:43) at emitNone (events.js:111:20) at ConcatStream.emit (events.js:208:7) at finishMaybe ([eval]:88932:14) at afterWrite ([eval]:88794:3) at _combinedTickCallback (internal/process/next_tick.js:144:20) at process._tickCallback (internal/process/next_tick.js:180:9