For World of Warcraft no working

My mudfish is stopped working for wow today and show tones of error code “MUDEC_00049: no entry for sid 527”, it happened after I re-subscribed it. It still not working now, I waited for more than 10 hrs. It works pretty well the day before, how can I fix it?

What I have tried:
-add credit to my account
-extend my subscribe to world of warcraft
-restarting the mudfish program completely
-config the Access Control List (actually it is in default setting)
-restart my network
-restart my router
-restart my PC
-use another network source (usb over network by mobile)

Please check Policy change for Data Plan - 20210607 link and try to equip the subscription voucher. Now the default plan type for Subscription is changed little bit.

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