[Help] ApiGetGamePointsConvertsionRates failed

sometimes gives this error ..

..
000003.280| r3dScaleformMovie::Load() 'data\menu\Frontend.swf' ok
000006.541| SetHomeDir: Levels\WZ_FrontEndLighting
000006.541| We have 1518 MB texture memory
000006.685| SetLoadStage: 0.15 sec in ApiGetShopData
000006.822| SetLoadStage: 0.14 sec in ApiGameRewards
000006.981| SetLoadStage: 0.16 sec in ApiGetItemsInfo
000007.133| WO_API: session disconnected
000007.133| ApiGetGamePointsConvertsionRates failed: 1000007.134| SetLoadStage: 0.15 sec in ApiGetConvertGP2GD
000007.276| WO_API: session disconnected
000007.276| GetProfile FAILED, code: 1
000007.286| Couldn't get profile data! stage: 5
000008.176| Loading SWF data\menu\Frontend.swf
000008.502| r3dScaleformMovie::Load() 'data\menu\Frontend.swf' ok
000013.530| obj_Zombie::FreePhysSkeletonCache:000013.530| done in 0.00 seconds
000013.546| Deleting render targets
000014.733| r3dBackgroundTaskDispatcher::Close
000014.733| Exiting background thread: 13228
000015.395|
000015.399| WARNING: pd3ddev have 24598 reference counts

:(::(::(::(:
000006.495| SetLoadStage: 0.38 sec in ApiGetShopData
000006.872| SetLoadStage: 0.38 sec in ApiGameRewards
000006.909| r3dapp: SysCmd: f012
000007.277| SetLoadStage: 0.41 sec in ApiGetItemsInfo
000007.661| WO_API: session disconnected
000007.662| ApiGetGamePointsConvertsionRates failed: 1000007.663| SetLoadStage: 0.38 sec in ApiGetConvertGP2GD
000008.072| WO_API: session disconnected
000008.073| GetProfile FAILED, code: 1
000008.290| WM_EXITSIZEMOVE: 1
000008.343| Couldn't get profile data! stage: 5
000009.043| Loading SWF data\menu\Frontend.swf
000009.319| r3dScaleformMovie::Load() 'data\menu\Frontend.swf' ok
000013.432| obj_Zombie::FreePhysSkeletonCache:000013.432| done in 0.00 seconds
000013.434| Deleting render targets
000015.933| r3dBackgroundTaskDispatcher::Close
000015.933| Exiting background thread: 1384
000016.266|
000016.270| WARNING: pd3ddev have 24598 reference counts

Which source?
Watch windows event log for that period.
I think IIS or SQL server or maybe network interruption.
What does it stand for?
Game server restart or full windows server restart?