500 error when I click on administration

500 error when clicking on administration, this worked fine, but from one moment to another it stopped working and I really don’t know why. I would like if you could help me.
Beforehand thank you very much. My English is not good, I apologize.

1.I uninstalled and reinstalled and now it does not show me the administration area / admin/context .

I use php 7.4 and the latest version of OJS 3.3.0-14

pongo mas antecedentes.

The method in this video may solve your problem.