UiPath Executor stopped working - READ PDF WITH OCR

Hello Community

I have a documentation validation process in which I have to extract certain characters from these files using the activities Read PDF With OCR.

When the robot has processed around 900 cases the execution stops and shows me the error that I attach below.

I have updated the version of UiPath Studio to 2020.4.0 but the same thing happens.

Could someone help me on this, please?

Thank you.