If you don’t mind losing all your data (including the input processing you set up, dashboards, etc) then anything is worth trying.
If the SD card has physical damage (which you might only find out later) then a new card is necessary. You can take out the old card, download the emonCMS image and re-flash it - undoubtedly the cheapest and simplest. See Update & Upgrade - Guide | OpenEnergyMonitor → 1. Prepare a new card
Of course it’s the same procedure whether you’re re-flashing the old card to revitalise it, or flashing a new card.