Fix minor errors, early 09/2024

[smadbe]

Description

Fixes several small various bugs reported these last days by our issue tracker.

[smadbe]

[auto-generated message] E2E test report on: https://algorea-static.s3.eu-central-1.amazonaws.com/branch/fix-202409-minor-errors/playwright-report/index.html

[sentry-io[bot]]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ UnknownError: {} new UnknownError(deployments/fioi-prod/2.46.1-d... View Issue
• ‼️ UnknownError: {} new UnknownError(deployments/fioi-prod/2.46.2-d... View Issue

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