Sensehat isn't detected

[uqlel]

I installed webthings using .deb file on raspbian
I have also installed webthing from pip
And i have also installed sensehat-webthing from gui
But things is always showing "Searching for new devices", and after a while, it shows that it doesn't found anything
After disabling and enabling, still doesn't work, systemctl status webthings-gateway shows this:

kwi 23 11:11:57 rpi.local webthings-gateway[520]: 2021-04-23 11:11:57.946 INFO   : Opened a new things socket
kwi 23 11:12:14 rpi.local webthings-gateway[520]: 2021-04-23 11:12:14.174 INFO   : About to call startPairing on SenseHatAdapter
kwi 23 11:12:14 rpi.local webthings-gateway[520]: 2021-04-23 11:12:14.201 INFO   : Opened a new things socket
kwi 23 11:12:23 rpi.local webthings-gateway[520]: 2021-04-23 11:12:23.070 ERROR  : Failed to toggle add-on sense-hat-adapter
kwi 23 11:12:23 rpi.local webthings-gateway[520]: 2021-04-23 11:12:23.365 ERROR  : TypeError: Cannot read property 'send' of undefined
kwi 23 11:12:23 rpi.local webthings-gateway[520]:     at Plugin.sendMsg (/opt/webthings-gateway/build/webpack:/src/plugin/plugin.js:580:1)
kwi 23 11:12:23 rpi.local webthings-gateway[520]:     at Plugin.unload (/opt/webthings-gateway/build/webpack:/src/plugin/plugin.js:737:1)
kwi 23 11:12:23 rpi.local webthings-gateway[520]:     at AddonManager.unloadAddon (/opt/webthings-gateway/build/webpack:/src/addon-manager.js:979:1)
kwi 23 11:12:23 rpi.local webthings-gateway[520]:     at AddonManager.disableAddon (/opt/webthings-gateway/build/webpack:/src/addon-manager.js:615:1)
kwi 23 11:12:29 rpi.local webthings-gateway[520]: 2021-04-23 11:12:29.647 INFO   : Loading add-on: sense-hat-adapter

sorry for my bad english :/