Unexpected token '<', "<!DOCTYPE "... is not valid JSON

[casttaing-lab]

Type: Bug

Unexpected token '<', "<!DOCTYPE "... is not valid JSON

Extension version: 0.37.8
VS Code version: Code 1.109.5 (0725862, 2026-02-19T19:43:32.382Z)
OS version: Windows_NT x64 10.0.26100
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) Ultra 7 255H (16 x 3686)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x8086, DEVICE=0x7d51 [Intel(R) Arc(TM) 140T GPU (15GB)], DRIVER_VENDOR=Intel, DRIVER_VERSION=32.0.101.7026 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.7309 Machine model name: Machine model version: direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	30.93GB (14.10GB free)
Process Argv	--crash-reporter-id f47edc2a-071f-4f1a-84f3-430f8caf0977
Screen Reader	no
VM	0%

A/B Experiments

vsliv368:30146709
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
63221493:31336333
envsactivate1:31464700
cloudbuttont:31379625
3efgi100_wstrepl:31403338
bj468946:31457056
use-responses-api:31390855
ddidtcf:31399634
je187915:31401257
ec5jj548:31422691
cp_cls_t_966_ss:31454198
4je02754:31466945
ge8j1254_inline_auto_hint_haiku:31431912
nes-autoexp-off:31446584
a5gib710:31434435
00h15499_gpt_53_codex:31464542
7a04d226_do_not_restore_last_panel_session:31438103
gpt_5_3_codex_f4456sfsd:31465102
preserve_tokens:31444547
cp_cls_t_1081:31454832
copilot-nes-oct-trt:31432596
ia-use-proxy-models-svc:31452481
a43f0574:31442827
e9c30283:31461165
nes-fast-additive:31462666
g_63ac8346:31467999
9c05b404_max_request_50:31466385
idci7584:31464702
edit_mode_hidden:31461530
nostats:31457175
864ei723_large_tool_results_to_disk:31460878
notips:31457203
nes-extended-on:31455476
chat:31457767
ah:31460422

[vs-code-engineering]

Thank you for reporting this issue. We truly appreciate your feedback.

According to GitHub Status, there is currently a service disruption affecting GitHub Copilot. This may be the cause of the issue you're experiencing.

What you can do:

• Check GitHub Status for real-time updates
• Once the service disruption is resolved, please give it another try
• If you continue to experience issues after the outage is resolved, please update this issue with your findings

We're keeping this issue open for now as we don't have a main service outage tracking issue. We apologize for any inconvenience this may have caused.

Thank you for your patience and understanding.