
How do I solve ExeID Buffer Index Out of Range Error importing Items from Config. Packages ?
Perform the same action in an online or docker contained sandbox and enabled debugger. This will let you know where is the error and how variables are populated.
Otherwise, split the import in N chunks and try out the import of these. If one is failing then you have offending row(s), if all of them fails then most probably you have offending column(s) and/or offending row(s)