similar topic: HTTPS connection error #150 "Unexpected response text" since this morning — MQTT works fine
My take:
Just to add another data point — this does not seem to be related to modifications or connection type.
I’m managing 100+ installations and have been seeing this error (#150 “Unexpected response text”) quite often recently across multiple systems.
From my experience:
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Happens on completely stock systems (no mods)
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Occurs on:
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Ethernet-connected sites
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Wi-Fi-connected sites
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LTE/4G connections
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Across different ISPs/providers
So it’s very unlikely to be a local network issue.
There are already multiple topics reporting the same behavior (including the one linked above), which further points to a broader issue.
Observed behavior:
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MQTT (remote console & real-time data) → works fine
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HTTPS/VRM logging → fails with error #150
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Usually resolves itself:
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often within hours
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but sometimes takes days
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Impact:
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Data accumulates on the GX device - needs to have SD inserted, otherwise lost
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VRM graphs and historical data lag behind
What I’ve tested:
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Reboots → no consistent improvement
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Toggling HTTPS/SSL → no effect
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Switching networks/providers → same issue
Given how widespread and consistent this is, it really looks like a server-side issue (possibly incorrect response from VRM endpoint) rather than anything on the installation side.
Would be great to get:
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confirmation from Victron
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clarification of root cause
Right now it just sits in error state until it recovers on its own.
Thanks.