Closed
Description
Problem Definition
After I import data from Bitstamp and click on "Profit and Loss Report" -> "Generate", I get the error:
Profit and Loss Report Generation
The report generation was not possible due to an error
An unexpected response was received while generating the profit and loss report. This might indicate an issue with the generation mechanism. Please check the logs for any error messages (you might have to enable debug logging first) and create an issue.
The backend query task died unexpectedly: Object of type FVal is not JSON serializable
Logs
[11/04/2025 23:31:53 CEST] DEBUG rotkehlchen.exchanges.bitstamp Greenlet-7: Bitstamp API request request_url=https://www.bitstamp.net/api/v2/crypto-transactions/, options={'limit': 1000, 'offset': 15000, 'include_ious': False}
[11/04/2025 23:31:53 CEST] DEBUG rotkehlchen.exchanges.bitstamp Greenlet-7: Remaining Bitstamp unmatched crypto_asset_movements=[]
[11/04/2025 23:31:53 CEST] ERROR rotkehlchen.api.rest Greenlet with id 5463821568: Greenlet for task 12 dies with exception: Object of type FVal is not JSON serializable.
Exception Name: <class 'TypeError'>
qException Info: Object of type FVal is not JSON serializable
Traceback:
File "src/gevent/greenlet.py", line 900, in gevent._gevent_cgreenlet.Greenlet.run
File "rotkehlchen/api/rest.py", line 461, in _do_query_async
File "rotkehlchen/api/rest.py", line 1698, in process_history
File "rotkehlchen/rotkehlchen.py", line 962, in process_history
File "rotkehlchen/history/manager.py", line 265, in get_history
File "rotkehlchen/exchanges/exchange.py", line 422, in query_history_with_callbacks
File "rotkehlchen/utils/mixins/lockable.py", line 48, in wrapper
File "rotkehlchen/exchanges/exchange.py", line 382, in query_history_events
File "rotkehlchen/db/history_events.py", line 147, in add_history_events
File "rotkehlchen/db/history_events.py", line 119, in add_history_event
File "rotkehlchen/history/events/structures/asset_movement.py", line 154, in serialize_for_db
File "rotkehlchen/history/events/structures/base.py", line 208, in _serialize_base_tuple_for_db
File "json/__init__.py", line 231, in dumps
File "json/encoder.py", line 200, in encode
File "json/encoder.py", line 258, in iterencode
File "json/encoder.py", line 180, in default
System Description
Operating system: MacOS Sonoma 14.6
Rotki version:1.38.2