I am also hosting on Synology (DS1621+) running DSM 7.3.2.
I did some research before rolling back, and it is risky rolling back databases to older versions (stop bitwarden before doing this). I restored my files to the previous day to ensure my stuff would be ok before doing it.
Inside bitwarden.sh line 67-70, change the COREVERSION and WEBVERSION to the 2026.2.1 which is the previous version.
# Please do not create pull requests modifying the version numbers.
COREVERSION=“2026.2.1”
WEBVERSION=“2026.2.1”
KEYCONNECTORVERSION=“2025.11.0”
After that, update docker-compose.yml all images to version 2026.2.1.
I then did a bitwarden.sh stop, then bitwarden.sh rebuild and then a bitwarden.sh start.
https://bitwarden.com/help/install-on-premise-linux/#script-commands-reference
@Nail1684 the issue does appear to be the same one you linked too on GitHub.