Steps to Reproduce:
Click on the OCR button in the edit mode.
Actual Results:
In many pages no OCR text is produced and the button gets frozen, try e. g. https://en.wikisource.org/w/index.php?title=Page:Guide_to_the_Bohemian_section_and_to_the_Kingdom_of_Bohemia_-_1906.djvu/242&action=edit&redlink=1
Expected Results:
OCR text should be produced.
The problem was announced e. g. at:
https://en.wikisource.org/wiki/Wikisource:Scriptorium/Help#OCR_button_not_working
https://en.wikisource.org/wiki/Wikisource:Scriptorium/Help#OCR_failed_and_the_button_is_frozen