Portfolio - Error getting last traded prices for some connectors (HTX, ascendex) / trading pairs

[nikspz]

Describe the bug

Dashboard not showing price for some pairs for HTX, ascendex

backend-api logs showing this error

2024-07-19 07:04:02,279 - root - ERROR - Error getting last traded prices for trading pairs ['TRX-USDT', 'BTC-USDT', 'YCT-USDT', 'ETH-USDT', 'FRONT-USDT', 'RNDR-USDT']: 'RNDR-USDT'
2024-07-19 07:04:02,736 - root - ERROR - Error getting last traded prices for trading pairs ['ETH-USDT', 'HTX-USDT', 'SOL-USDT', 'BTC-USDT']: 'tick'
2024-07-19 07:05:04,318 - root - ERROR - Error getting last traded prices for trading pairs ['TRX-USDT', 'BTC-USDT', 'YCT-USDT', 'ETH-USDT', 'FRONT-USDT', 'RNDR-USDT']: 'RNDR-USDT'
2024-07-19 07:05:04,690 - root - ERROR - Error getting last traded prices for trading pairs ['ETH-USDT', 'HTX-USDT', 'SOL-USDT', 'BTC-USDT']: 'tick'

Steps to reproduce bug

1. clone latest deploy repo
2. bash setup_dev.sh
3. open credentials and connect Htx and Ascendex with balance availble for these coins/tokens
4. Review portfolio UI and backend API logs

[rapcmia]

Reproduced on Binance spot where last trade returns error on GVT-USDT

• Found error related to tokens that still have balance but not available on exchange or delisted

[rapcmia]

https://github.com/hummingbot/backend-api/issues/28#issuecomment-2523138787