Hi, welcome!
We don't really have enough info to help you out with all these problems. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.
If you've never heard of a reprex before, you might want to start by reading this FAQ:
On screenshots - When giving a screenshot, unless the issue with your code is super apparent, you're basically asking people who want to replicate your issue to retype the code from the image. Since people are here offering their help for free, it's a bit of an ask.
Directly answering your question, note the top most error message. There's a problem with an argument in grep. A typo, gnore.case... should be ignore.case...