Your current network is vulnerable, please change the network to estabilih vpn

Got the same error message, and the problem fixed by the iRule mentioned in https://my.f5.com/manage/s/article/K000138683.

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Sys::Version
Main Package
  Product     BIG-IP
  Version     17.1.1.3
  Build       0.0.5
  Edition     Point Release 3
  Date        Thu Mar 21 04:23:27 PDT 2024