RENDERING EXPORTATION PROBLEM. Since Friday morning I have no longer been able to export either images or videos of my current project.

Good morning, since Friday morning I have no longer been able to export images of my current project (not of the previous ones already completed and of which I had already exported images some time ago). On Friday I tried to export the other remaining images, but it didn’t work. Once I try to export, the remaining time calculation bar it remains empty for hours without having any export, after which the program freezes and I have to force quit to be able to continue using the PC. How can I solve this problem?