Plugin error message is unclear about the cause even with --verbose_failures

Below is the output for building the plugin I'm working on and the error message doesn't provide me much to go on. Comparing the BUILD file of my plugin with Image plugin, they're almost identical outside of the plugin name and local files

$ bazel build tensorboard:tensorboard --verbose_failures
...
ERROR: /home/z/projects/TB/z-2020-Tensorboard/tensorboard/plugins/z_video/z_video_dashboard/BUILD:7:15: Checking webfiles //tensorboard/plugins/z_video/z_video_dashboard:z_video_dashboard failed (Exit 1): ClosureWorker failed: error executing command (cd /home/z/.cache/bazel/_bazel_z/235ea30dc62cb54a15febc8e6e607029/execroot/org_tensorflow_tensorboard && \ exec env - \ bazel-out/host/bin/external/io_bazel_rules_closure/java/io/bazel/rules/closure/ClosureWorker @@bazel-out/k8-fastbuild/bin/tensorboard/plugins/z_video/z_video_dashboard/z_video_dashboard-webfiles-checker-args.txt) Execution platform: @local_config_platform//:host

There are other errors but I'm guessing they're just a consequence of the prior:

ERROR: tensorboard/plugins/z_video/z_video_dashboard/z-video-dashboard.html: Referenced ../tf-dashboard-common/tf-regex-group.html (/tf-dashboard-common/tf-regex-group.html) without depending on a web_library() rule providing it ERROR: tensorboard/plugins/z_video/z_video_dashboard/z-video-dashboard.html: Referenced ../tf-paginated-view/tf-paginated-view.html (/tf-paginated-view/tf-paginated-view.html) without depending on a web_library() rule providing it NOTE: Use suppress=["strictDependencies"] to make the errors above warnings Target //tensorboard:tensorboard failed to build ERROR: /home/z/projects/TB/z-2020-Tensorboard/tensorboard/BUILD:289:21 Checking webfiles //tensorboard/plugins/z_video/z_video_dashboard:z_video_dashboard failed (Exit 1): ClosureWorker failed: error executing command (cd /home/z/.cache/bazel/_bazel_z/235ea30dc62cb54a15febc8e6e607029/execroot/org_tensorflow_tensorboard && \ exec env - \ bazel-out/host/bin/external/io_bazel_rules_closure/java/io/bazel/rules/closure/ClosureWorker @@bazel-out/k8-fastbuild/bin/tensorboard/plugins/z_video/z_video_dashboard/z_video_dashboard-webfiles-checker-args.txt) Execution platform: @local_config_platform//:host INFO: Elapsed time: 0.454s, Critical Path: 0.16s INFO: 0 processes. FAILED: Build did NOT complete successfully