Adding multiple keyframes
Hi all,
I would like to add a typewriter effect to a text on multiple lines. I am trying to add a new source text keyframe for each frame to do this. See this video method 1: EASY Typewriter effect WITH BLINKING CURSOR | Premiere Pro 2023 (youtube.com)
When I try and do it, I get the following error:

Can you help me to fix this? I have already resetted the preferences on premiere pro, but did not help.
Thank you!

