Cannot update my env variables on web service free instance

I have a deployed web service free instance since 2023. Now I’ve made some changes to the app that requires me to update some env variables, but I haven’t been able to update them since every time I click Save or Save & deploy, there is a random error message that pops up: “free instances cannot be used with min scaling different from zero“. I have never touched any setting on min scaling. It is all set on default values.

If you know anything about this or have experienced some weird error like this, please reply to this topic.