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This is what I noticed in the logs:
X509Util: Failed to validate the certificate chain, error: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
We use Okta for authentication. So I sent it to our IT department.
They replaced the certificate.
That resolved the issue. I was prompted the Okta login instead of that network login message and everything started working.
Here's their explanation:
"The way certificate was installed it required the client to download the intermediate cert, which android has problems with sometimes. So they included it, so there is only one download for the certificate."
Hope this helps.