explorer_event always empty about explorer HOT 3 OPEN

Could you provide some more context, like which Substrate network you want connected to and include some logging information like the Docker logs if any exceptions are raised.

from explorer.

{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353450\n","stream":"stdout","time":"2023-02-27T09:41:45.583017041Z"}
{"log":"2023-02-27 09:41:45 ⚙️ ⚠️ Failed to decode extrinsic 3353451-1 (Decoder class for "Header" not found)\n","stream":"stdout","time":"2023-02-27T09:41:45.590419941Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353451\n","stream":"stdout","time":"2023-02-27T09:41:45.591412996Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353452\n","stream":"stdout","time":"2023-02-27T09:41:45.60005343Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353453\n","stream":"stdout","time":"2023-02-27T09:41:45.606513502Z"}
{"log":"2023-02-27 09:41:45 ⚙️ ⚠️ Failed to decode extrinsic 3353454-1 (Decoder class for "Header" not found)\n","stream":"stdout","time":"2023-02-27T09:41:45.613254568Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353454\n","stream":"stdout","time":"2023-02-27T09:41:45.614517803Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353455\n","stream":"stdout","time":"2023-02-27T09:41:45.621603369Z"}
{"log":"2023-02-27 09:41:45 ⚙️ ⚠️ Failed to decode extrinsic 3353456-1 (Decoder class for "Header" not found)\n","stream":"stdout","time":"2023-02-27T09:41:45.628954148Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353456\n","stream":"stdout","time":"2023-02-27T09:41:45.62998749Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353457\n","stream":"stdout","time":"2023-02-27T09:41:45.636525145Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353458\n","stream":"stdout","time":"2023-02-27T09:41:45.642299948Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353459\n","stream":"stdout","time":"2023-02-27T09:41:45.652182472Z"}
{"log":"2023-02-27 09:41:45 ⚙️ ⚠️ Failed to decode extrinsic 3353460-1 (Decoder class for "Header" not found)\n","stream":"stdout","time":"2023-02-27T09:41:45.667738079Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353460\n","stream":"stdout","time":"2023-02-27T09:41:45.668742021Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353461\n","stream":"stdout","time":"2023-02-27T09:41:45.67531921Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353462\n","stream":"stdout","time":"2023-02-27T09:41:45.682447695Z"}
{"log":"2023-02-27 09:41:45 ⚙️ ⚠️ Failed to decode extrinsic 3353463-1 (Decoder class for "Header" not found)\n","stream":"stdout","time":"2023-02-27T09:41:45.689337079Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353463\n","stream":"stdout","time":"2023-02-27T09:41:45.69030403Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353464\n","stream":"stdout","time":"2023-02-27T09:41:45.696824529Z"}
{"log":"2023-02-27 09:41:45 ⚙️ Decoded extrinsics for #3353465\n","stream":"stdout","time":"2023-02-27T09:41:45.704810236Z"}
{"log":"2023-02-27 09:41:45 ⚙️ ⚠️ Failed to decode extrinsic 3353466-1 (Decoder class for "Header" not found)\n","stream":"stdout","time":"2023-02-27T09:41:45.712120854Z"}

from explorer.

thank you @arjanz

i try to this Substrate network
https://polkadot.js.org/apps/?rpc=wss://mainnet.nftmart.io/rpc/ws#/explorer

from explorer.