Lovelace Minimalstic theme not appearing properly

Hi,
I am trying very hard to get ahead of initial setting required to see Minimalist theme peoperly.
I followed all steps mentioned on - Installation - UI Lovelace Minimalist.
Can anybody suggest , what could be the error, I have tried to reset cookies manytimes but nothting seems to work

Error Log is as follows:

2023-10-28 04:39:57.233 WARNING (SyncWorker_3) [homeassistant.loader] We found a custom integration ui_lovelace_minimalist which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-28 04:39:57.237 WARNING (SyncWorker_3) [homeassistant.loader] We found a custom integration browser_mod which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-28 04:39:57.239 WARNING (SyncWorker_3) [homeassistant.loader] We found a custom integration hacs which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-28 04:40:17.477 WARNING (MainThread) [aioesphomeapi.reconnect_logic] Can't connect to ESPHome API for esphome-web-f255b0 @ 192.168.1.9: Error connecting to ('192.168.1.9', 6053): [Errno 113] Connect call failed ('192.168.1.9', 6053) (SocketAPIError)
2023-10-28 04:40:17.481 WARNING (MainThread) [aioesphomeapi.reconnect_logic] Can't connect to ESPHome API for esphome-web-7a9564 @ 192.168.1.7: Error connecting to ('192.168.1.7', 6053): [Errno 113] Connect call failed ('192.168.1.7', 6053) (SocketAPIError)
2023-10-28 04:40:17.482 WARNING (MainThread) [aioesphomeapi.reconnect_logic] Can't connect to ESPHome API for esphome-web-3cced0 @ 192.168.1.8: Error connecting to ('192.168.1.8', 6053): [Errno 113] Connect call failed ('192.168.1.8', 6053) (SocketAPIError)
2023-10-28 04:45:16.184 WARNING (SyncWorker_6) [homeassistant.loader] We found a custom integration ui_lovelace_minimalist which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-28 04:45:16.187 WARNING (SyncWorker_6) [homeassistant.loader] We found a custom integration browser_mod which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-28 04:45:16.188 WARNING (SyncWorker_6) [homeassistant.loader] We found a custom integration hacs which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-28 04:45:32.255 WARNING (MainThread) [aiogithubapi] You need to call .set_last_commit to set this property
2023-10-28 04:45:41.223 WARNING (SyncWorker_6) [homeassistant.loader] We found a custom integration ui_lovelace_minimalist which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-28 04:45:41.226 WARNING (SyncWorker_6) [homeassistant.loader] We found a custom integration browser_mod which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-28 04:45:41.228 WARNING (SyncWorker_6) [homeassistant.loader] We found a custom integration hacs which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant