INVALID_INPUT - INVALID_ACCOUNT_ID:
It means you need to re-authorize your data source (Plaid or Banking).
Scroll up and click "Disconnect Plaid" or "Disconnect Banking" for the individual job.
Then click Authorize and and follow the Plaid prompts to re-authorize this job.
Finally, restart your job per its schedule.
More info:
API_ERROR - INTERNAL_SERVER_ERROR:
Something went wrong at Plaid. Flatly cannot offer any solution for this.
General considerations for outages at Plaid.
Flatly has no influence over Plaid's ability to resolve outages. Flatly is just one of thousands of integrators all relying on Plaid's infrastructure. If Plaid is experiencing an outage with an institution, it is not constructive to request an individual ticket be opened up with Plaid. Plaid monitors all integrations' health states at all times and actively works to resolve outages.