Enabled DEBUG mode and found this on appserver log:
[2024-03-07 17:41:12.737] INFO [pool-5-thread-1] CertificateCache.getOrCreateTrustedCertificateWithDecodedChain:227
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Getting certificate chain for TrustedCertificateChainId(sourceId=f6fa7cb3-6c6d-4903-be7e-7bc41a5dcb6a, sourceType=HYPERVISOR_MANAGER, chainType=X509) and task: 039badd6-c94d-44ad-b8e2-8ac8b5f58761: [Export] from 2024-03-07T17:39Z to 2024-03-08T03:39Z
[2024-03-07 17:41:12.739] DEBUG [pool-5-thread-1] CertificateCache.getLocalCertificateChainIfAvailableAndUpToDate:265
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Getting locally stored certificate for TrustedCertificateChainId(sourceId=f6fa7cb3-6c6d-4903-be7e-7bc41a5dcb6a, sourceType=HYPERVISOR_MANAGER, chainType=X509)
[2024-03-07 17:41:12.739] DEBUG [pool-5-thread-1] CertificateCache.getLocalCertificateChainIfAvailableAndUpToDate:268
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Locally stored certificate chain not available for TrustedCertificateChainId(sourceId=f6fa7cb3-6c6d-4903-be7e-7bc41a5dcb6a, sourceType=HYPERVISOR_MANAGER, chainType=X509)
[2024-03-07 17:41:12.740] DEBUG [pool-5-thread-1] CertificateCache.getCertificateChainFromServer:298
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Getting certificate chain from SBR server: TrustedCertificateChainId(sourceId=f6fa7cb3-6c6d-4903-be7e-7bc41a5dcb6a, sourceType=HYPERVISOR_MANAGER, chainType=X509)
[2024-03-07 17:41:12.786] DEBUG [pool-5-thread-1] CertificateCache.decodeCertificates:309
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Attempting to decode certificate chain for HYPERVISOR_MANAGER f6fa7cb3-6c6d-4903-be7e-7bc41a5dcb6a
[2024-03-07 17:41:12.789] DEBUG [pool-5-thread-1] CertificateCache.refreshInMemoryKeyStore:103
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Refreshed in-memory key store - 2 aliases stored
**[2024-03-07 17:41:12.894] DEBUG [pool-5-thread-1] CompositeTrustManager.lambda$anyTrustManagerTrustsServerCertificateChain$1:91
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Trust manager sun.security.ssl.X509TrustManagerImpl@72c0c2cc doesn't trust server certificate chain
[2024-03-07 17:41:12.895] DEBUG [pool-5-thread-1] CompositeTrustManager.lambda$anyTrustManagerTrustsServerCertificateChain$1:91
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Trust manager sun.security.ssl.X509TrustManagerImpl@61a1843c doesn't trust server certificate chain**
[2024-03-07 17:41:12.897] ERROR [pool-5-thread-1] ChunkApiDownloader.lambda$getFileSizeRetryPolicy$2:157
[039badd6-c94d-44ad-b8e2-8ac8b5f58761] Attempt failed
Maybe it gives some clue on what's happening.