Translation on version 6.1.1

Hi,
I recently updated EM to 6.1.1 in my dev site. I find there are some strings cannot be translated for the front end. In particular in the booking form for which I insert a placeholder #_BOOKINGFORM. Text like “Registration Form”, “Tickets”, “Ticket Type”, “Spaces”. The headings “Registration Form” and “Tickets” are new additions in ver. 6.1.1. I cannot find these source text to translate. One other forum user indicated that the pot file is not found.
I use Loco Translate plugin for my translation.
Please help.