Error when saving a field

I’ve been getting an error lately, whenever I try to save a new leads field, in my self-hosted Mautic instance. When I press “Save & Close”, it takes a while, like something is loading, and then the error appears,. Once I go back within the browser, the field is created and everything seems to be fine.

In the beginning it was working ok, so I don’t know what makes it throw this error now. Any ideas?

I’ve been getting an error lately, whenever I try to save a new leads field, in my self-hosted Mautic instance. When I press “Save & Close”, it takes a while, like something is loading, and then the error appears,. Once I go back within the browser, the field is created and everything seems to be fine.
In the beginning it was working ok, so I don’t know what makes it throw this error now. Any ideas?

Any error message in Mautic logs (app/logs folder) and server error log?