e/OS installed "successfully", phone stuck in bootloader mode

I installed e/OS on a refurbished Pixel 5 that was running Android 14. The process using the web installer seemed to work flawlessly and ended with the message that installation had been successful and e/OS would now start up, which would take a while. However, the phone is stuck in bootloader mode: “Can’t find valid operating system. The device will not start.”
Only afterwards I read here that you’re not supposed to downgrade to a previous Android version with e/OS.
Is there anything I can do?
Mind you I’m not an expert user, but happy to thoroughly follow instructions at the level of the Easy Installer.
Thanks so much for your advice!

Regain your privacy! Adopt /e/OS the deGoogled mobile OS and online servicesphone

From my point of view you have the choice

  • install an android T 13 based GogolOS, then install Official /e/OS -T

or much easier

  • install Community /e/OS-U over your existing android U 14 based GogolOS