fix: schedule loading from storage

[limwa]

Fixes an issue where schedule loading presents an error when the app is first opened. This is because the loadFromStorage method throws an unexpected error.

Review checklist

• [x] Terms and conditions reflect the current change
• [ ] Contains enough appropriate tests
• [x] If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• [x] Properly adds an entry in changelog.md with the change
• [x] If PR includes UI updates/additions, its description has screenshots
• [x] Behavior is as expected
• [x] Clean, well-structured code

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 16%. Comparing base (d460c06) to head (8cbeba2). Report is 5 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1315 +/- ## ======================================= Coverage 16% 16% ======================================= Files 233 233 Lines 7220 7220 ======================================= Hits 1139 1139 Misses 6081 6081 ```