Excel VBA combine two working workbooks

HI Expert,
I have 2 workbooks
1). The first one  is a drop-down - vlookup and update source workbook that works great.
-  basically this one has a data table on one sheet and a vlookup sheet that shows the info from source through a drop down choice. It also allows updating the source by hitting the update button (VBA)

2) On the second one (expiry email) it has a dashboard where you push a button and it creates emails to send to the trainers that have expiring employees for license. (works great). There is additional code in this one where you add a name to the data table and it adds five names to the Expiry Date table (ExpDate) this also works great. I then manually add the five categories and copy down the vlookups and it works. This ExpDate sheet is needed for the email program to work.

Both WBs uses the same data table (Master Log) as the master information.

I want to combine these into one work book, but every time I try to do it I get errors in the VB. Something to do with the drop-down.

It would be awesome if I could get this working.
Thanks so much
Stripped-expiry-email.xlsm
Stripped-VlookUP-and-Update-only.xlsm