Error establishing a database connection after switching from PHP 7.3.5 to PHP 7.4.1

Yes

Got it. Can you please provide your local-lightning.log file? See How do I retrieve Local’s log file? for instructions on how to do so.

Some sites still run 7.3.5 as they don’t work on 7.4.1, and some new installs since 7.4.1 were available to run smooth. But upgrading have not been successfully working for me.

Allow me to share over email, do you mind sharing your email and I send it over there.