So none of the above has anything to do with the grabbing parameters issue though... but I believe you are confused of what the patch option actually does
So if you are on a jagex launcher you have 2 choices on how to run the client:
1. Patch Osbot over Runelite or HDOS, so whenever you launch it through the jagex launcher the stealth client opens up
2. Use mirror mode and DO NOT patch anything, just launch the Legacy java client from the jagex launcher and after that open OSBot and click mirror mode.
If you are not able to open up mirror mode you do not have the correct java version installed.
Mirror mode requires java 8 installed, make sure every newer version is removed, you can run a Jarfix to cleanup all java data afterwards to make sure everything is correct (https://johann.loefflmann.net/en/software/jarfix/index.html)
thats should make it clear ^^
If you ahve any other questions/issues let us know