Check your log
See which of your mods are outdated or broken. The log is read in your browser.
Drop Latest.log hereor click to choose it
The log is MelonLoader\Latest.log in your game folder. In Steam: right-click Schedule I, Manage, Browse local files.
C:\Program Files (x86)\Steam\steamapps\common\Schedule I\MelonLoader\Latest.log
Paste the log text instead
The log stays on your PC. Only the mod list is checked, and nothing is kept.