Telegram integration error after Operating System update

After performing the Home Assistant Operating System update yesterday, my Telegram integration started to show an error. Had to comment out the configuration in yaml to restart HA.

I tried resetting the HA, resetting the hardware, and nothing worked. I get the following error when I go back to the configuration:

Configuration Validation
Platform error notify.telegram - Exception importing homeassistant.components.telegram.notify
Platform error notify.telegram - Exception importing homeassistant.components.telegram.notify
Component error: telegram_bot - Exception importing homeassistant.components.telegram_bot

Log
Logger: homeassistant.components.websocket_api.http.connection
Source: components/hassio/init.py:705
Integration: Home Assistant WebSocket API (documentation, issues)
First occurred: 21:09:07 (1 occurrences)
Last logged: 21:09:07

[140604409755344] The system cannot restart because the configuration is not valid: Platform error notify.telegram - Exception importing homeassistant.components.telegram.notify Platform error notify.telegram - Exception importing homeassistant.components.telegram.notify Component error: telegram_bot - Exception importing homeassistant.components.telegram_bot

Traceback (most recent call last): File “/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py”, line 202, in handle_call_service await hass.services.async_call( File “/usr/src/homeassistant/homeassistant/core.py”, line 1738, in async_call task.result() File “/usr/src/homeassistant/homeassistant/core.py”, line 1775, in _execute_service await cast(Callable[[ServiceCall], Awaitable[None]], handler.job.target)( File “/usr/src/homeassistant/homeassistant/components/hassio/init.py”, line 705, in async_handle_core_service raise HomeAssistantError( homeassistant.exceptions.HomeAssistantError: The system cannot restart because the configuration is not valid: Platform error notify.telegram - Exception importing homeassistant.components.telegram.notify Platform error notify.telegram - Exception importing homeassistant.components.telegram.notify Component error: telegram_bot - Exception importing homeassistant.components.telegram_bot

Can anyone tell me how to fix it?

The error was fixed afert core update.