Indicate on screen is not working in pdf

when i try to find an element in pdf , the indicate on screen is not working
it highlights all over the pdf

please refer the solution

May be it is an image, not a text. Please check.
In that case you have to use OCR activities.

it is a text i can select the text from that pdf

Try re-starting studio/PC.

More on the same issue here: Selecting PDF Elements
and here: Unable to Identify Elements in Machine Readable PDF
Maybe one of the proposed fixes work for you.
All the best!