Looking at the error logs and the code you've shared, I can see there's an issue with your Telegram bot that analyzes groups to find users with NFT gifts. The error is occurring during initialization, specifically with an "unsupported callable" error and unclosed client sessions.

The main issue appears to be in the main.py file where there's a problem with how the application is being initialized. Let me provide a solution:

The key issues I've identified:

1. The error "unsupported callable" suggests there's a problem with how a function is being called or passed as a callback.
2. The "Unclosed client session" error indicates that aiohttp client sessions aren't being properly closed when the application exits.
3. There appears to be a circular dependency or initialization order issue where components are trying to use other components before they're fully initialized.

The fixes include:

1. Ensuring proper initialization order by initializing the bot first before setting up handlers
2. Properly handling asyncio tasks and cleanup
3. Adding a small delay before exit to allow connections to close properly
4. Removing the MyClass which seems redundant and may be causing confusion

Additionally, make sure your bot_core.py properly initializes the Telethon manager before using it:

These changes should help resolve the initialization issues and prevent the unclosed client session errors.