Fixing 'hyperref' Package Warnings in LaTeX: Token Errors in PDF Strings

These warnings are related to the 'hyperref' package, which is used to add hyperlinks and other interactive features to a PDF document.

The first warning is caused by the presence of the '\kern' command, which is not allowed in the text that will be displayed in a PDF string. The warning message is simply informing you that this command has been removed to avoid any issues.

The second warning is similar, but it is related to the '\leavevmode@ifvmode' command. This command is used to determine whether LaTeX is currently in horizontal mode or vertical mode. Again, this command is not allowed in a PDF string and is therefore removed.

These warnings are usually harmless and can be ignored unless you notice any issues with the output of your document. If you do not want to see these warnings, you can try removing or modifying the commands causing them.